diff --git a/ROADMAP.md b/ROADMAP.md
index c93d48108..34f066595 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -2,7 +2,7 @@
 
 **Stage: alpha** · next: beta, ~14 points and ~340–600 h away
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Epson ERF decoded, 3 bodies verified) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Mamiya MEF and Epson ERF decoded) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6
 
 One-page summary of how close LightCraft is to Adobe Lightroom. Agents: read this, then pick work
 from [docs/gaps.md](docs/gaps.md). The full assessment, method and evidence are in
@@ -114,6 +114,8 @@ Ranked toward beta; detail in [docs/roadmap.md](docs/roadmap.md), gaps in [docs/
 
 ## Progress log
 
+- 2026-10-12: Mamiya MEF (ZD) decodes from sensor data and is imported; verified on a CC0 file. 239 models
+  verified, 35 unsupported; headline numbers unchanged.
 - 2026-10-12: Epson ERF (R-D1, R-D1s, R-D1x) decodes from sensor data, white balance measured from each
   file's preview; 3 bodies verified on CC0 files. 238 models verified; headline numbers unchanged.
 - 2026-10-11: Canon EOS R5 Mark II C-RAW decodes from sensor data (57% of its files opened as a
@@ -163,6 +165,7 @@ Ranked toward beta; detail in [docs/roadmap.md](docs/roadmap.md), gaps in [docs/
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-12 | minor | Mamiya MEF decoded and imported: ZD verified (239); headline numbers unchanged |
 | 2026-10-12 | minor | Epson ERF decoded: 3 more verified models (238); headline numbers unchanged |
 | 2026-10-11 | minor | EOS R5 Mark II CR3 verified: CR3 on four verified bodies, RAW decoding 76% → 77%; headline numbers unchanged |
 | 2026-10-10 | minor | RAW measured model by model; RAW decode and colour as explicit rows: full 59% → 61%, mainstream 51% → 49%, essentials 63% → 64%; beta ~14 points |
diff --git a/crates/engine/src/import.rs b/crates/engine/src/import.rs
index 20d1983e1..ce1c347e4 100644
--- a/crates/engine/src/import.rs
+++ b/crates/engine/src/import.rs
@@ -39,7 +39,7 @@ pub const EXTENSIONS: &[&str] = &[
     // Decoded when built with the codecs' `heif` feature; otherwise the import reports them as
     // failed with the reason ("HEIC/HEIF support isn't included in this build").
     "heic", "heif", "avif", // no AV1 decoder yet: reported as failed, like a HEIC without the feature
-    "iiq", "crw", "mrw", "x3f", "kdc", "mos", "erf", "3fr", "fff",
+    "iiq", "crw", "mrw", "x3f", "kdc", "mos", "erf", "3fr", "fff", "mef",
 ];
 
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
diff --git a/crates/mcp/src/headless.rs b/crates/mcp/src/headless.rs
index 8678b1f7e..cd072e6e2 100644
--- a/crates/mcp/src/headless.rs
+++ b/crates/mcp/src/headless.rs
@@ -14,7 +14,7 @@ use crate::backend::{Backend, ProgressHook};
 pub const PHOTO_EXTENSIONS: &[&str] = &[
     "jpg", "jpeg", "png", "tif", "tiff", "webp", "dng", "cr2", "cr3", "nef", "arw", "raf", "orf", "rw2", "rwl", "raw", "pef", "srw", "psd", "jxl",
     "gif", "bmp", "avif", // containers LightCraft cannot decode but imports as preview only (their embedded JPEG)
-    "iiq", "crw", "mrw", "x3f", "kdc", "mos", "erf", "3fr", "fff",
+    "iiq", "crw", "mrw", "x3f", "kdc", "mos", "erf", "3fr", "fff", "mef",
 ];
 
 /// Headless backend: a [`Session`] with filesystem hooks.
diff --git a/crates/raw/src/lib.rs b/crates/raw/src/lib.rs
index 801ee7f5b..c5211a6e2 100644
--- a/crates/raw/src/lib.rs
+++ b/crates/raw/src/lib.rs
@@ -113,6 +113,8 @@ pub enum RawFormat {
     KodakDcs,
     /// Epson ERF: a CFA sub-IFD of 12-bit samples in 16-byte blocks (`vendor::erf`).
     Erf,
+    /// Mamiya MEF: an uncompressed 12-bit packed CFA sub-IFD (`vendor::mef`).
+    Mef,
     /// Another TIFF-based raw (3FR, IIQ, ERF, KDC, DCR, MOS, …).
     OtherTiff,
 }
@@ -135,6 +137,7 @@ impl RawFormat {
                 | RawFormat::Srw
                 | RawFormat::KodakDcs
                 | RawFormat::Erf
+                | RawFormat::Mef
         )
     }
 }
@@ -209,6 +212,9 @@ pub fn probe(bytes: &[u8]) -> Option<RawFormat> {
     if vendor::erf::raw_ifd(&t, bytes.len()).is_some() {
         return Some(RawFormat::Erf);
     }
+    if vendor::mef::raw_ifd(&t, bytes.len()).is_some() {
+        return Some(RawFormat::Mef);
+    }
     if vendor::kodak::raw_ifd(&t, bytes).is_some() {
         return Some(RawFormat::KodakDcs);
     }
@@ -378,6 +384,7 @@ fn decode_with(bytes: &[u8], mode: Mode) -> Result<RawImage> {
         RawFormat::Srw => vendor::srw::decode(bytes, mode),
         RawFormat::KodakDcs => vendor::kodak::decode(bytes, mode),
         RawFormat::Erf => vendor::erf::decode(bytes, mode),
+        RawFormat::Mef => vendor::mef::decode(bytes, mode),
         RawFormat::OtherTiff => Err(RawError::Unsupported(other_tiff_reason(bytes))),
         other => Err(RawError::Unsupported(format!("{other:?} files are not decoded yet"))),
     }
diff --git a/crates/raw/src/sparse.rs b/crates/raw/src/sparse.rs
index 85e599349..cf13223e7 100644
--- a/crates/raw/src/sparse.rs
+++ b/crates/raw/src/sparse.rs
@@ -227,7 +227,7 @@ fn tiff_plan(bytes: &[u8], loaded: &Ranges, preview: bool) -> HeaderPlan {
         return plan;
     }
     // (the Make is usually in the first kilobytes: a NEF, PEF or ORF is known before the rest is read)
-    if matches!(crate::probe(bytes), Some(RawFormat::Nef | RawFormat::Nrw | RawFormat::Orf | RawFormat::Pef | RawFormat::Erf)) {
+    if matches!(crate::probe(bytes), Some(RawFormat::Nef | RawFormat::Nrw | RawFormat::Orf | RawFormat::Pef | RawFormat::Erf | RawFormat::Mef)) {
         return HeaderPlan::Whole("its header probe reads samples");
     }
     let Ok(tiff) = Tiff::parse(bytes) else { return HeaderPlan::Whole("TIFF structure") };
@@ -260,7 +260,7 @@ fn tiff_plan(bytes: &[u8], loaded: &Ranges, preview: bool) -> HeaderPlan {
         holes.insert(off.saturating_add(HEAD), len);
     }
     finish(len, loaded, &holes, &meta, || match crate::probe(bytes) {
-        Some(RawFormat::Nef | RawFormat::Nrw | RawFormat::Orf | RawFormat::Pef | RawFormat::Erf) => {
+        Some(RawFormat::Nef | RawFormat::Nrw | RawFormat::Orf | RawFormat::Pef | RawFormat::Erf | RawFormat::Mef) => {
             HeaderPlan::Whole("its header probe reads samples")
         }
         Some(f) if f.is_supported() => HeaderPlan::Ready,
diff --git a/crates/raw/src/vendor/mef.rs b/crates/raw/src/vendor/mef.rs
new file mode 100644
index 000000000..244245818
--- /dev/null
+++ b/crates/raw/src/vendor/mef.rs
@@ -0,0 +1,185 @@
+//! Mamiya MEF (ZD): a big-endian TIFF whose first `SubIFDs` child is an uncompressed 12-bit packed CFA image.
+//!
+//! Sources: TIFF 6.0 (container, MSB-first bit packing, `CFAPattern`) and our own black-box analysis of the one CC0
+//! MEF sample on raw.pixls.us (Mamiya ZD); every number below was measured on it.
+//!
+//! - IFD0 is a 144 x 192 RGB thumbnail with three `SubIFDs`: the raw (4016 x 5344, 12 bits, `Compression` 1,
+//!   photometric CFA, one strip of exactly 1.5 bytes per pixel, two samples in three bytes most significant bits
+//!   first, as TIFF packs them), a 992 x 1328 and a 240 x 320 RGB preview, all uncompressed and 8 bits. No JPEG.
+//! - `CFAPattern` `00 01 01 02`: RGGB; the two green sites agree (means 254 and 256 against 235 and 165).
+//! - No masked border and no stored black level: the darkest 0.01% of each site's samples sit at 3..6 and the
+//!   minimum is 0, so black is 0. White: the saturation plateau, else 4095.
+//! - The 992 x 1328 preview shows a 3968 x 5312 window (4 sensor pixels per preview pixel) that starts at column 24,
+//!   row 12: that offset gives the best correlation of the preview's luminance with the box-filtered mosaic (0.965,
+//!   against 0.83 for the full frame). It is the default crop.
+//! - Orientation is the raw IFD's own `Orientation` (6 on the sample, a portrait shot).
+//! - No white-balance tag was found (the maker note holds an ICC-like profile), so the as-shot gains are measured
+//!   from that preview's neutral pixels ([`crate::wb_estimate`]).
+use crate::{BlackLevel, Cfa, ColorData, Mode, OpcodeLists, RawData, RawError, RawFormat, RawImage, Rect, Result};
+use lightcraft_geom::Orientation;
+use lightcraft_tiff::image::chunk_bytes;
+use lightcraft_tiff::{Ifd, Tiff, tags as t};
+
+/// Where the preview's window starts in the sensor frame, and how many sensor pixels one preview pixel covers.
+const CROP_ORIGIN: (usize, usize) = (24, 12);
+const PREVIEW_SCALE: usize = 4;
+
+fn is_mamiya(tiff: &Tiff) -> bool {
+    tiff.find(t::MAKE).and_then(|e| e.value.as_str()).is_some_and(|m| m.to_ascii_uppercase().starts_with("MAMIYA"))
+}
+
+/// The raw IFD of a Mamiya MEF: CFA, 12 bits, uncompressed, one strip of 1.5 bytes per pixel.
+pub(crate) fn raw_ifd(tiff: &Tiff, len: usize) -> Option<&Ifd> {
+    if !is_mamiya(tiff) {
+        return None;
+    }
+    tiff.all_ifds().into_iter().find(|i| {
+        let Ok(info) = i.image() else { return false };
+        let (w, h) = (info.width as u64, info.height as u64);
+        i.u16(t::PHOTOMETRIC) == Some(t::photometric::CFA)
+            && i.u16(t::COMPRESSION).unwrap_or(1) == 1
+            && i.u16(t::BITS_PER_SAMPLE) == Some(12)
+            && w > 0
+            && w % 2 == 0
+            && matches!(info.chunks(len as u64).as_slice(), [c] if Some(c.len) == (w * 3 / 2).checked_mul(h))
+    })
+}
+
+/// The largest uncompressed 8-bit RGB sub-IFD (the preview): its pixels, width and height.
+fn rgb_preview<'a>(tiff: &Tiff, bytes: &'a [u8]) -> Option<(&'a [u8], usize, usize)> {
+    tiff.all_ifds()
+        .into_iter()
+        .filter_map(|i| {
+            let info = i.image().ok()?;
+            let ok = i.u16(t::PHOTOMETRIC) == Some(2)
+                && i.u16(t::COMPRESSION).unwrap_or(1) == 1
+                && i.u16(t::SAMPLES_PER_PIXEL) == Some(3)
+                && i.u64s(t::BITS_PER_SAMPLE).is_some_and(|b| b.iter().all(|&v| v == 8));
+            let (w, h) = (info.width as usize, info.height as usize);
+            let chunks = info.chunks(bytes.len() as u64);
+            let [c] = chunks.as_slice() else { return None };
+            let px = chunk_bytes(bytes, c)?;
+            (ok && px.len() >= w.checked_mul(h)?.checked_mul(3)?).then_some((px, w, h))
+        })
+        .max_by_key(|(_, w, h)| w * h)
+}
+
+pub(crate) fn decode(bytes: &[u8], mode: Mode) -> Result<RawImage> {
+    let tiff = Tiff::parse(bytes)?;
+    let raw = raw_ifd(&tiff, bytes.len()).ok_or_else(|| RawError::Unsupported("Mef raw image not found".into()))?;
+    let info = raw.image()?;
+    let (w, h) = (info.width as usize, info.height as usize);
+    let n = w.checked_mul(h).filter(|n| *n > 0 && *n <= crate::MAX_SAMPLES).ok_or(RawError::Limit("image too large"))?;
+    let cfa = match (raw.u64s(t::CFA_REPEAT_PATTERN_DIM).as_deref(), raw.bytes(t::CFA_PATTERN_EP)) {
+        (Some([2, 2]), Some(p)) if p.len() == 4 && p.iter().all(|&c| c <= 2) => Cfa { width: 2, height: 2, pattern: p.to_vec() },
+        _ => return Err(RawError::Unsupported("Mef raw without a 2x2 CFAPattern".into())),
+    };
+    let preview = rgb_preview(&tiff, bytes);
+    let crop = match preview {
+        Some((_, pw, ph)) => {
+            let (cw, ch) = (pw.saturating_mul(PREVIEW_SCALE), ph.saturating_mul(PREVIEW_SCALE));
+            if cw > 0 && ch > 0 && CROP_ORIGIN.0 + cw <= w && CROP_ORIGIN.1 + ch <= h {
+                Rect::new(CROP_ORIGIN.0, CROP_ORIGIN.1, cw, ch)
+            } else {
+                Rect::new(0, 0, w, h)
+            }
+        }
+        None => Rect::new(0, 0, w, h),
+    };
+    // the white balance is measured from the samples, so the header probe reads them too
+    let chunks = info.chunks(bytes.len() as u64);
+    let src = chunks.first().and_then(|c| chunk_bytes(bytes, c)).ok_or_else(|| RawError::Corrupt("Mef strip outside file".into()))?;
+    let mut d = vec![0u16; n];
+    crate::unpack::unpack_msb(src, 12, &mut d);
+    let white = super::white_from_data(&d, 12);
+    let black = BlackLevel::uniform(0.0);
+    let frame = crate::wb_estimate::Frame { data: &d, width: w, crop, cfa: &cfa, black: &black, white };
+    let wb = match preview {
+        Some((px, pw, ph)) => crate::wb_estimate::as_shot_rgb(px, pw, ph, &frame),
+        None => crate::wb_estimate::as_shot(bytes, &frame),
+    };
+    let data = if mode == Mode::Full { RawData::U16(d) } else { RawData::U16(Vec::new()) };
+    let mut metadata = lightcraft_meta::from_tiff(&tiff);
+    metadata.width = Some(crop.width as u32);
+    metadata.height = Some(crop.height as u32);
+    let orientation = raw.u16(t::ORIENTATION).or_else(|| tiff.ifds.first().and_then(|i| i.u16(t::ORIENTATION))).unwrap_or(1);
+    let img = RawImage {
+        format: RawFormat::Mef,
+        width: w,
+        height: h,
+        cpp: 1,
+        data,
+        cfa: Some(cfa),
+        bits: 12,
+        black,
+        white: vec![white],
+        active_area: Rect::new(0, 0, w, h),
+        crop,
+        orientation: Orientation::from_exif(orientation),
+        color: ColorData::default(),
+        wb_multipliers: wb,
+        linearized: false,
+        opcodes: OpcodeLists::default(),
+        metadata,
+    };
+    img.validate_for(mode)?;
+    Ok(img)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use lightcraft_tiff::{ByteOrder, IfdBuilder, ImageData, TiffWriter, Value};
+
+    fn pack(px: &[u16]) -> Vec<u8> {
+        px.chunks(2).flat_map(|p| [(p[0] >> 4) as u8, ((p[0] & 15) << 4) as u8 | (p[1] >> 8) as u8, p[1] as u8]).collect()
+    }
+
+    fn sample(w: u32, h: u32, px: &[u16]) -> Vec<u8> {
+        let mut raw = IfdBuilder::new();
+        raw.set(t::NEW_SUBFILE_TYPE, Value::Long(vec![0]));
+        raw.set(t::IMAGE_WIDTH, Value::Long(vec![w]));
+        raw.set(t::IMAGE_LENGTH, Value::Long(vec![h]));
+        raw.set(t::BITS_PER_SAMPLE, Value::Short(vec![12]));
+        raw.set(t::COMPRESSION, Value::Short(vec![1]));
+        raw.set(t::PHOTOMETRIC, Value::Short(vec![t::photometric::CFA]));
+        raw.set(t::ORIENTATION, Value::Short(vec![6]));
+        raw.set(t::CFA_REPEAT_PATTERN_DIM, Value::Short(vec![2, 2]));
+        raw.set(t::CFA_PATTERN_EP, Value::Byte(vec![0, 1, 1, 2]));
+        raw.set_image(ImageData::Strips { rows_per_strip: h, strips: vec![pack(px)] });
+        let mut ifd0 = IfdBuilder::new();
+        ifd0.set(t::MAKE, Value::Ascii("Mamiya-OP Co.,Ltd.".into()));
+        ifd0.set(t::MODEL, Value::Ascii("MAMIYA ZD".into()));
+        ifd0.add_sub_ifd(raw);
+        TiffWriter::new(ByteOrder::Big, false).write(&[ifd0]).unwrap()
+    }
+
+    #[test]
+    fn decodes_packed_12_bit() {
+        let px: Vec<u16> = (0..16 * 6).map(|i| (i * 41 % 4096) as u16).collect();
+        let f = sample(16, 6, &px);
+        assert_eq!(crate::probe(&f), Some(RawFormat::Mef));
+        let r = crate::decode(&f).unwrap();
+        assert_eq!(r.data, RawData::U16(px));
+        assert_eq!(r.orientation, Orientation::from_exif(6));
+        assert_eq!(r.crop, Rect::new(0, 0, 16, 6));
+        assert_eq!(crate::probe_info(&f).unwrap(), r.info());
+    }
+
+    #[test]
+    fn malformed_files_never_panic() {
+        let px: Vec<u16> = (0..16 * 6).map(|i| (i * 7 % 4096) as u16).collect();
+        let f = sample(16, 6, &px);
+        for n in 0..f.len() {
+            let _ = crate::decode(&f[..n]);
+        }
+        for i in 0..f.len() {
+            for v in [0u8, 0xff] {
+                let mut g = f.clone();
+                g[i] = v;
+                let _ = crate::decode(&g);
+                let _ = crate::probe_info(&g);
+            }
+        }
+    }
+}
diff --git a/crates/raw/src/vendor/mod.rs b/crates/raw/src/vendor/mod.rs
index 45fe4549b..3541b481e 100644
--- a/crates/raw/src/vendor/mod.rs
+++ b/crates/raw/src/vendor/mod.rs
@@ -12,6 +12,7 @@ pub mod crx;
 pub(crate) mod crx_wavelet;
 pub mod erf;
 pub mod kodak;
+pub mod mef;
 pub mod nef;
 pub mod nefc;
 pub mod orf;
diff --git a/crates/raw/src/wb_estimate.rs b/crates/raw/src/wb_estimate.rs
index 96918a853..17a86a2a5 100644
--- a/crates/raw/src/wb_estimate.rs
+++ b/crates/raw/src/wb_estimate.rs
@@ -67,7 +67,20 @@ fn median(v: &mut [f64]) -> Option<f64> {
 fn from_preview(bytes: &[u8], f: &Frame) -> Option<[f32; 3]> {
     let jpeg = crate::preview::embedded_preview(bytes)?;
     let (px, pw, ph, ch) = crate::tiffraw::lossy_jpeg(&jpeg, 3).ok()?;
-    if ch != 3 || pw.checked_mul(ph)? > MAX_PREVIEW_PIXELS {
+    if ch != 3 {
+        return None;
+    }
+    from_rgb(&px, pw, ph, f)
+}
+
+/// Gains from an 8-bit RGB preview `pw` x `ph` (rows of RGB triplets) showing the crop: its neutral pixels, else
+/// grey world. For raws whose preview is an uncompressed RGB image rather than a JPEG.
+pub(crate) fn as_shot_rgb(px: &[u8], pw: usize, ph: usize, f: &Frame) -> Option<[f32; 3]> {
+    from_rgb(px, pw, ph, f).or_else(|| grey_world(f))
+}
+
+fn from_rgb(px: &[u8], pw: usize, ph: usize, f: &Frame) -> Option<[f32; 3]> {
+    if pw.checked_mul(ph)? > MAX_PREVIEW_PIXELS || px.len() < pw * ph * 3 {
         return None;
     }
     // the preview must show the crop: aspect ratios within 3%
diff --git a/crates/raw/tests/corpus.rs b/crates/raw/tests/corpus.rs
index 6d43700b2..88b6775d1 100644
--- a/crates/raw/tests/corpus.rs
+++ b/crates/raw/tests/corpus.rs
@@ -42,7 +42,7 @@ fn corpus_raw_decodes() {
         let preview = embedded_preview(&bytes);
         let tp = t0.elapsed().as_secs_f64() * 1e3;
         // DNG previews are optional (and some carry only an uncompressed RGB thumbnail); vendor raws embed a JPEG,
-        // except the Panasonic `.RAW` files of 2005–2007 and Canon's explicit HEVC preview tracks.
+        // except the Panasonic `.RAW` files of 2005–2007, Canon's explicit HEVC preview tracks and Mamiya MEF.
         if let Some(p) = &preview {
             let jpeg = p.starts_with(&[0xff, 0xd8]) && p.ends_with(&[0xff, 0xd9]);
             let jxl = p.starts_with(&[0xff, 0x0a]) || p.starts_with(b"\0\0\0\x0cJXL ");
@@ -51,7 +51,11 @@ fn corpus_raw_decodes() {
             let hevc_preview = fmt == RawFormat::Cr3
                 && lightcraft_meta::cr3::parse_cr3(&bytes)
                     .is_some_and(|c| c.tracks.iter().any(|t| t.kind == lightcraft_meta::cr3::Cr3TrackKind::Other(*b"HEVC") && t.data.is_some()));
-            assert!(fmt == RawFormat::Dng || name.starts_with("raw-panasonic-") || hevc_preview, "{name}: no embedded preview");
+            // the Mamiya ZD's previews are uncompressed RGB sub-IFDs, not JPEGs
+            assert!(
+                fmt == RawFormat::Dng || fmt == RawFormat::Mef || name.starts_with("raw-panasonic-") || hevc_preview,
+                "{name}: no embedded preview"
+            );
         }
         let preview_kb = preview.as_ref().map_or(0, |p| p.len() / 1024);
         let t1 = Instant::now();
@@ -1166,3 +1170,25 @@ fn corpus_epson_erf() {
     }
     eprintln!("ERF: {checked} corpus files checked");
 }
+
+/// Mamiya MEF (`crates/raw/src/vendor/mef.rs`): the uncompressed 12-bit strip decodes to a smooth 4016 x 5344 RGGB
+/// mosaic, the crop is the preview's window and the white balance comes from the RGB preview. Skips when absent.
+#[test]
+fn corpus_mamiya_mef() {
+    let Ok(bytes) = std::fs::read(corpus_root().join("raw").join("mef-mamiya-zd.mef")) else {
+        eprintln!("skip: mef-mamiya-zd.mef absent");
+        return;
+    };
+    assert_eq!(probe(&bytes), Some(RawFormat::Mef));
+    let img = decode(&bytes).unwrap_or_else(|e| panic!("{e}"));
+    assert_eq!((img.width, img.height, img.bits), (4016, 5344, 12));
+    assert_eq!((img.crop.x, img.crop.y, img.crop.width, img.crop.height), (24, 12, 3968, 5312));
+    assert_eq!(img.cfa.as_ref().map(|c| c.name()).as_deref(), Some("RGGB"));
+    assert_eq!(img.orientation, lightcraft_geom::Orientation::from_exif(6));
+    let wb = img.wb_multipliers.expect("white balance");
+    eprintln!("MEF wb {wb:?}");
+    assert!(wb.iter().all(|g| (0.5..=4.0).contains(g)), "{wb:?}");
+    let lightcraft_raw::RawData::U16(d) = &img.data else { panic!("float data") };
+    let step: f64 = d.chunks(4016).take(400).flat_map(|r| r.windows(3).map(|w| f64::from(w[0].abs_diff(w[2])))).sum::<f64>() / (400.0 * 4014.0);
+    assert!(step < 40.0, "rough {step}");
+}
diff --git a/docs/gaps.md b/docs/gaps.md
index 1c34f2f1c..f63874fbf 100644
--- a/docs/gaps.md
+++ b/docs/gaps.md
@@ -1,6 +1,6 @@
 # Gaps: where LightCraft falls short of Lightroom
 
-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-12 · **Change:** minor (gap 20: Epson ERF decodes; CR3 entry names the EOS R7 C-RAW fix and the refused CRX variants; CI and Windows / Linux entries note the 0.6.0 riscv64 build; camera colour: tone curve from black-and-white camera JPEGs; Compare and Reference get sharp zoom windows; gap 4 shrinks; gap 14: the HDR switch is read from crs XMP; gaps 2 and 10: EOS R5 Mark II CR3 verified) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-12 · **Change:** minor (gap 20: Mamiya MEF and Epson ERF decode; CR3 entry names the EOS R7 C-RAW fix and the refused CRX variants; CI and Windows / Linux entries note the 0.6.0 riscv64 build; camera colour: tone curve from black-and-white camera JPEGs; Compare and Reference get sharp zoom windows; gap 4 shrinks; gap 14: the HDR switch is read from crs XMP; gaps 2 and 10: EOS R5 Mark II CR3 verified) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6
 
 Every known shortfall, one entry each, ranked by user impact (how many Lightroom users hit it, and
 how hard it blocks them), then by effort. **Agents pick work from the top** (the first entry nobody is
@@ -24,7 +24,7 @@ Hours are Opus 5.5 agent wall-clock hours (see [target-app-parity.md](target-app
 | 7 | **Nikon High Efficiency NEF** (HE / HE★ on Z 8, Z 9, Z 6III, Z f, Z50II, Z5II when set to HE) | named and preview only (#193); needs a pure-Rust JPEG XS decoder | +1.1 points (only shots taken in HE; lossless works on the same bodies); low gain per hour (~0.04), so not a beta blocker | 20–40 | [raw-parity](raw-parity.md) |
 | 8 B | **No lens profile database** (LR-EDIT-OPTICS-PROFILE): only DNG opcodes, RW2 in-file distortion and Sony ILCE-7RM4A distortion | Adobe ships 3,635 lens profiles; we never use them | distortion / vignetting correction is a default step for many | 40–80 + calibration shots | [raw-parity](raw-parity.md#lens-profiles) |
 | 9 B | **Tests don't run in CI on macOS, Windows or Linux x64**: only FreeBSD runs `cargo test`; the others build packages | `.github/workflows/` (freebsd, packaging-lint, release, windows-arm64); the linux-riscv64 release job added in 0.6.0 (#844) runs only `lightcraft-cli --version` under QEMU | regressions reach users on the main platforms; `cargo xtask ci` runs only locally | 6–12 | [target-app-parity](target-app-parity.md#by-dimension) |
-| 10 B | **Per-model verification thin, plus cheap per-body decode fixes**: 238 of 1,446 Adobe models verified (16%), ~42% of photographers on a verified body; Nikon 5 bodies verified, Canon 12. Cheap fixes: Z 6II packed 14-bit NEF (#769, PR #671), Sony A100 / F828 regression (#702), DSLR-A200…A390 / A850 12-bit ARW (#535) | measured: [raw/coverage.tsv](raw/coverage.tsv) | per-body bugs (levels, crops, WB) surface only from users | 25–45 | [raw-parity](raw-parity.md#by-maker-measured) |
+| 10 B | **Per-model verification thin, plus cheap per-body decode fixes**: 239 of 1,446 Adobe models verified (17%), ~42% of photographers on a verified body; Nikon 5 bodies verified, Canon 12. Cheap fixes: Z 6II packed 14-bit NEF (#769, PR #671), Sony A100 / F828 regression (#702), DSLR-A200…A390 / A850 12-bit ARW (#535) | measured: [raw/coverage.tsv](raw/coverage.tsv) | per-body bugs (levels, crops, WB) surface only from users | 25–45 | [raw-parity](raw-parity.md#by-maker-measured) |
 | 11 | **Enhance: Raw Details, Super Resolution; AI denoise without shippable weights or X-Trans** | ENH rows 0%; denoise Bayer only, RawNIND weights GPL and opt-in | Fujifilm users get no AI denoise; nobody gets it out of the box | 30–60 + model decision | [raw-parity](raw-parity.md#demosaic-levels-crops-and-lens-metadata) |
 | 12 | **Content-aware / generative remove, detect distractions, reflections removal** | REM rows 75%; patch synthesis missing | cleanup work goes back to Photoshop | 25–45 (+ generative model) | [target-app-parity](target-app-parity.md#ai) |
 | 13 | **Lightroom catalog migration is one-way and approximate**: unsupported Adobe profiles / AI settings archived, history kept as data | lightroom-catalog-import.md | switching users lose some looks | 8–12 | [file-format-parity](file-format-parity.md) |
@@ -34,7 +34,7 @@ Hours are Opus 5.5 agent wall-clock hours (see [target-app-parity.md](target-app
 | 17 | **Tethered capture** | ⬜ | studio photographers | 25–45 + cameras | [hardware-parity](hardware-parity.md) |
 | 18 | **Video**: playback, trim, global edits, export | VID rows 0% | users who mix stills and clips | 25–45 | [target-app-parity](target-app-parity.md#features) |
 | 19 | **Plug-in ecosystem**: no Lightroom SDK equivalent (export / publish plug-ins, metadata plug-ins) | ⬜ | pro workflows built on plug-ins (LR/Enfuse, Jeffrey's exporters, Negative Lab Pro) | 40–80 + owner decision | [target-app-parity](target-app-parity.md#by-dimension) |
-| 20 | **Long-tail raw formats**: compressed SRW, ARQ pixel shift, IIQ, Hasselblad compression, X3F, CRW, MRW, KDC, DCR, MEF, GPR, old FinePix (ERF decodes since 2026-10-12) | raw-parity.md | small user share each | 43–83 | [raw-parity](raw-parity.md) |
+| 20 | **Long-tail raw formats**: compressed SRW, ARQ pixel shift, IIQ, Hasselblad compression, X3F, CRW, MRW, KDC, DCR, GPR, old FinePix (ERF and MEF decode since 2026-10-12) | raw-parity.md | small user share each | 42–82 | [raw-parity](raw-parity.md) |
 | 21 | **Localization**: 9 of 15 shipped languages partial (74–99% of catalog messages), lower-layer errors English; Hindi, Arabic, Indonesian, Korean, Vietnamese absent; no RTL or complex shaping | measured from catalogs | non-English users see mixed English | 55–90 (shipped to full); 145–255 (five new) | [localization-parity](localization-parity.md) |
 | 22 | **Pen pressure**, OS monitor profiles, follow-window colour | hardware-parity.md | brush users with tablets; multi-monitor setups | 11–22 | [hardware-parity](hardware-parity.md) |
 | 23 | **Accessibility** audit with screen readers; canvas tools keyboard-reachable | LR-BEHAV-ACCESS 🟡 | blind and low-vision users | 10–20 | [ui-parity](ui-parity.md) |
@@ -72,6 +72,7 @@ Beta-blocking gaps (B) total **~230–430 h**; with the stability and platform w
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-12 | minor | Gap 20 shrinks: Mamiya MEF decodes (`vendor/mef.rs`) and is imported; gap 10 count 238 → 239 |
 | 2026-10-12 | minor | Gap 20 shrinks: Epson ERF decodes (`vendor/erf.rs`), 3 bodies verified; gap 10 count 235 → 238 |
 | 2026-10-11 | minor | Reviewed against main after 0.6.0: CR3 entry names the CRX variants `crx.rs` still refuses and the R7 / R6 Mark II C-RAW state (decoding, not verified, so the measured numbers don't move); CI and Windows / Linux entries note the riscv64 release build (#844); R7 fix added to Closed recently. Panel docking (UI.9, #869) closes no listed gap |
 | 2026-10-11 | minor | Camera colour entry: raws with a black-and-white camera JPEG take its tone curve (#577); gap not closed |
diff --git a/docs/parity-checklist.md b/docs/parity-checklist.md
index 61abd6c2e..5cec60445 100644
--- a/docs/parity-checklist.md
+++ b/docs/parity-checklist.md
@@ -1,6 +1,6 @@
 # Lightroom parity checklist
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (LR-IMP-FORMATS: Epson ERF decodes; rapid slider entry; LR-PROF-CAMERACOLOR: tone curve from black-and-white camera JPEGs; LR-VIEW-ZOOM, LR-VIEW-COMPARE: Compare and Reference zoom windows; LR-IMP-FORMATS, LR-IMP-CAMERA-COVERAGE: EOS R5 Mark II CR3 decodes; renamed from `parity.md`; Top gaps moved to gaps.md, shortcut notes to ui-parity.md; filesystem history retry/Undo/Redo evidence; renamed from `parity.md`; Top gaps moved to gaps.md, shortcut notes to ui-parity.md) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (LR-IMP-FORMATS: Mamiya MEF and Epson ERF decode; rapid slider entry; LR-PROF-CAMERACOLOR: tone curve from black-and-white camera JPEGs; LR-VIEW-ZOOM, LR-VIEW-COMPARE: Compare and Reference zoom windows; LR-IMP-FORMATS, LR-IMP-CAMERA-COVERAGE: EOS R5 Mark II CR3 decodes; renamed from `parity.md`; Top gaps moved to gaps.md, shortcut notes to ui-parity.md; filesystem history retry/Undo/Redo evidence; renamed from `parity.md`; Top gaps moved to gaps.md, shortcut notes to ui-parity.md) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6
 
 The measured, row-by-row checklist: one row per Lightroom feature, menu item and shortcut, what we
 have and what is missing. It answers *does the feature exist?* (feature breadth). Whether it is good
@@ -80,7 +80,7 @@ differences and missing bindings are in [ui-parity.md](ui-parity.md#shortcuts).
 | LR-IMP-PROFILES | Import profiles & presets | P1 | ✅ | `cmd:file.importPresets`, `cmd:preset.import`, `cmd:profile.import`, `crates/engine/src/preset_import.rs`, `crates/engine/src/preset_luminar.rs` | presets: .lcpreset, XMP, classic .lrtemplate, photos carrying edits ("DNG presets"), Luminar looks (.lmp, .mplumpack collections; sliders with a counterpart), .zip bundles, folders (folder → group), drag & drop (an `.xmp` dropped together with its photo is that photo's sidecar and is not imported as a preset, issue #936); masks carried over; unmapped settings reported (fields that only describe the preset or photo, e.g. `Cluster`, `SortName`, `SupportsAmount2`, the as-shot white, empty Point Color slots, are not); profiles: .cube 3D LUTs (one toast reports both halves; a LUT that fails is named with its reason); Adobe profile formats deliberately unsupported |
 | LR-IMP-LOCAL | Work on files in place | P0 | ✅ | `cmd:library.browse`, `cmd:photo.addToLibrary`, `cmd:library.import` (mode add), `cmd:local.addRoot`, `cmd:local.hide`, `cmd:local.restoreHidden`, `crates/engine/src/cmd/browse.rs`, `crates/ui-egui/src/panels/left.rs` (`local_section`), `crates/ui-egui/src/panels/grid.rs` (`folder_header`) | Local: browse Pictures / Desktop / Downloads / Home or any folder without adding it (breadcrumb, Include subfolders, Add N to My Photos); browsed photos stay out of All Photos, albums and counts (album commands skip them and the album menus say to Add to My Photos first, issue #684); folders picked with Browse Folder… (or Keep in Local / Add to Local on a folder row) stay listed across restarts, and browsing a folder inside a listed one highlights it inside that tree (opened down to it, siblings reachable) instead of adding a root; edits go to XMP sidecars; importing promotes them; right-click a top-level location → Remove from Local hides the shortcut only (nothing on disk or in the catalog changes), saved with the UI state, and “Show N hidden locations” (or Browse Folder… on it) brings it back; a folder is one location however its path is spelled (`/` or `\`, trailing separator, `.`/`..`, drive-letter case; `folder_key` in `crates/catalog/src/query.rs`); browsed photos nobody changed are forgotten once their folder has not been browsed for 30 days (Settings → Performance → Local folders, 0 = never; checked when the library opens, or `cmd:library.forgetLocal` with `dryRun`; files and sidecars stay, browsing again brings them back; see `crates/catalog/src/local.rs` for what counts as a change) |
 | LR-IMP-SIDECAR-SPLIT | Separate XMP sidecar variants | P2 | ⬜ | `cmd:library.xmpPreferences` | sidecar naming option exists (stem/full), no split sidecars |
-| LR-IMP-FORMATS | Supported formats | P0 | 🟡 | `crates/codecs/src/lib.rs`, `crates/raw/src/lib.rs`, `crates/raw/src/jxl.rs` | JPEG, PNG, TIFF (1- to 64-bit integer, 16- to 64-bit float, incl. bilevel and CCITT fax), WebP, JXL, PSD, GIF, BMP (lossy wide-gamut JXL decodes to the right colours: jxl-oxide desaturated XYB rendered to P3/Rec. 2020, worked around in `crates/codecs/src/jxl.rs`); DNG (incl. lossy / Smart Preview DNG and DNG 1.7 JPEG XL tiles/strips: lossless ones decode bit-exactly on synthetic CFA and LinearRaw files, lossy ones are restored to the declared linear primaries without clipping or gamut mapping, checked on one real file with 108 lossy tiles, and any tile that fails to decode makes the file preview-only; DNG 1.7 row/column-interleaved rasters (`RowInterleaveFactor` / `ColumnInterleaveFactor`) are undone before the mosaic is read, so a file from Adobe's converter with a 2×2 interleave no longer decodes as four scaled-down copies in the wrong colours; a dimension the factor does not divide decodes with short trailing fields; verified on 4 real ILCE-6400 JPEG XL DNGs rendering bit-identical to their non-interleaved twins, factors above 2 rest on the plain reading of the tag; a single-chunk JPEG XL preview IFD is offered as the embedded preview; a DNG whose samples pile up at one value well below its stated `WhiteLevel`, as a camera app's 12-bit Bayer DNG that states 4095 and clips at 3567, has those samples raised to the white level on decode, so highlight reconstruction sees the clipped areas instead of white balance tinting them magenta, issue #548, `crates/raw/src/saturation.rs`), CR2 (colour-filter layout from the file's `CR2CFAPattern` tag, issue #85), ARW (pre-2017 bodies: white balance and black level from the encrypted `SR2SubIFD`, issue #148, its `WB_RGGBLevels` being the white balance the camera applied, issue #535; the DSLR-A900's packed 12-bit strip, two pixels per three bytes, read only when the strip is exactly 1.5 bytes per pixel, with its camera-JPEG window centred, checked on one CC0 file (A850 unmeasured); downsized Sony lossless YCbCr 4:2:0 / 4:2:2 tiles decoded to linear RGB, verified on private ILCE-7M4 3:2 & 4:3 examples including 16-bit full-resolution export; Sony DSC-R1 .SR2 decodes, its big-endian 16-bit words read in the order that fits the sample range, checked on the CC0 3221 sample; its crop and white balance live in the SR2SubIFD and are not read yet; ARW6 Compressed / Compressed (HQ) of the ILCE-7RM6 (`crates/raw/src/vendor/arw6.rs`, `crates/raw/src/llvc.rs`; 12-bit codes exact against a black-box oracle on 8 CC0 files, FF over the full frame, APS-C in the interior (LibRaw's own edge rows differ); output through our own companding curve, measured from CC0 lossless / ARW6 pairs; geometry checked against the camera JPEG, `docs/arw6-compression.md`; the ILCE-7M5 writes the same codec, unverified)), NEF (uncompressed, lossless and lossy compressed 12/14-bit, `crates/raw/src/vendor/nefc.rs`), RAF (uncompressed, lossless/lossy compressed Bayer and X-Trans; `crates/raw/src/vendor/rafc.rs`, full sensor verification on 13 bodies, `docs/raf-compression.md`), RW2 / Leica RWL / Panasonic RAW in every raw format (compressed 4 and 6, the prefix-coded strips of format 8 from the GH6 on, packed 2/5/7, the 16-bit words of the 2005–2007 bodies; black levels, in-camera aspect crops and mapped-out defect pixels; 178 CC0 files from 118 bodies checked, `crates/raw/src/vendor/rw2.rs`), PEF, ORF (uncompressed; colour-filter layout from the file's Exif `CFAPattern`; 12.8 bit/px 16-byte blocks of ten 12-bit samples + a zero pad byte, E-300 / E-330 / E-500 verified on CC0 files, E-M5 Mark II / PEN-F high-res files decode smooth but CFA and black unverified), Kodak DCS520C TIFF (a two-component 12-bit lossless JPEG strip, the two components the even and odd columns; the file's `GrayResponseCurve` table linearises the companded samples to 12 bits, black measured per CFA position, white balance from the `KodakIFD`; `RawFormat::KodakDcs`, `crates/raw/src/vendor/kodak.rs`, checked on the one CC0 sample against its IFD0 thumbnail), Hasselblad 3FR and FFF (a TIFF without a DNG version tag that describes its CFA IFD, levels, crop and white balance with DNG's tags; `RawFormat::CfaTiff`, read by `dng::decode_as`, RGGB when the file states no `CFAPattern`): uncompressed (X1D, X1D II, X2D, CFV 100C) and Hasselblad's lossless JPEG with scan selection value 8 (every FFF; H3D, H4D and CFV-50c 3FR), `ljpeg::decode_hasselblad`, its rule measured on 14 CC0 files with the ljpeg-explorer tool, Epson ERF (R-D1, R-D1s, R-D1x: a CFA sub-IFD of 12-bit samples in 16-byte blocks, ten MSB-first samples and a pad byte; maker-note black levels and picture size, the crop registered against the preview; no white-balance tag was found, so the as-shot gains are measured from the preview's neutral pixels, grey world without them, `crates/raw/src/wb_estimate.rs`; file-local look fitted to the preview; `crates/raw/src/vendor/erf.rs`, 3 CC0 files), Samsung SRW without compression (NX5, NX10, NX11 and the NX20-generation bodies NX20, NX200, NX210, NX1000 and NX1100 as 12-bit packed samples in either bit order, EX1 and WB2000 as 16-bit words; layout, camera-JPEG framing, levels and white balance from the maker note, `crates/raw/src/vendor/srw.rs`; median ΔE vs the camera JPEG 2.2–7.6 on 11 of the 12 files from 10 bodies checked, 10.7 (5.7 registered) on the backlit WB2000 sample). 12-bit NEF black level: maker note `0x003d` is in 14-bit units (D750, D780, D850, D7500, Z 50 checked). Lossy type 2 NEF curves of version `0x44 0x40` (D780, D6, Z 5, Z 6, Z 7, Z 7_2) span a quarter of the sample range, read from the table's own point spacing. Import probes (`probe_info`) of compressed NEFs decode only the first 128 rows, the ones the masked-trailing-column test reads in both the probe and the full decode (the D5100 and D7000 write 8 masked columns at 0 with no maker-note tag for them, compressed and uncompressed alike), instead of the whole Huffman stream: ~3 ms instead of the full decode time per file (386 ms on a 24 MP D750 file), issue #708. CR3 lossless CRX Bayer and version 0x100/0x200 C-RAW decodes to sensor pixels with timed white balance, black/white levels and file crop (the shot's aspect ratio from the maker note's `AspectInfo`); full sensor samples match the reference on M50/R100/R8 (`crates/raw/tests/cr3_corpus.rs`, `docs/cr3.md`). EOS R5 Mark II C-RAW and RAW decode too (the QP map's first-symbol literal and 23-zero escape, odd-height Bayer planes): 4 CC0 files pinned, every QP map of 33,665 private C-RAW files decodes exactly, and full-frame images match the camera JPEG. Unsupported coding variants retain metadata and use the embedded JPEG when available; HEVC preview decoding remains unsupported. Missing: CR3 unverified CRX variants, compressed ORF, compressed Samsung SRW (NX1, NX30, NX300, NX500, NX2000, NX3000, NX3300, NX mini: preview only with the reason), NEFs labelled compressed (34713) but stored uncompressed without a `0x0096` table (Z 6 packed 14-bit, D850 12-bit uncompressed), Nikon High Efficiency NEF (HE / HE★ from the Z 8, Z 9, Z 6III and Z f: compression 34713 with a JPEG XS codestream and no `0x0096` table; no public specification, so preview only with the reason "Nikon High Efficiency NEF", issue #193; Lossless compressed NEFs from the same bodies decode), NEF "lossy after split" (preview only: imported with `preview_only` = the decoder's reason, rendered as a rendered JPEG, flagged by a grid badge and loupe/Edit/Info notices, `previewOnly` in `catalog.query`; Reload clears it once the file decodes), TIFF-based raws whose raw data sits in a private block (Phase One / Leaf IIQ, Canon EOS-1D / 1Ds and the Kodak DCS Pro / DCS760C TIFFs (compression 65000): IFD0 is only a reduced RGB image next to a much larger declared picture) are recognised from that structure and import as `preview_only` with the reason, instead of opening as a thumbnail-sized ordinary image (`thumbnail_shell` in `crates/raw/src/lib.rs`), Recognised raws LightCraft cannot decode open as `preview_only` with any usable embedded JPEG, also Canon CRW, Minolta MRW and Sigma X3F (containers recognised by magic, preview found by a structural JPEG scan), Kodak KDC (IFD0 without `ImageWidth`) and Leaf MOS (scan), and any decode failure of a recognised raw, not only an unsupported variant; ones with no JPEG still fail with "without an embedded preview", AVIF decode (HEIC decodes only behind the non-default `heif` feature, which the release packages enable: `crates/heif`, heic-rs for the container and HEVC (bit-exact against libde265 on iPhone tiles) plus our own colour conversion, matching libheif within 1 code value on iPhone-style grids (VUI full range, Display P3 ICC, nclx, 10-bit, irot/imir/clap, gain map/depth ignored); 4:2:0/monochrome only, 4:2:2/4:4:4 Canon/Sony HIF refused; same policy as PhotoCraft), palette (indexed-colour) TIFF (refused by the `tiff` crate) |
+| LR-IMP-FORMATS | Supported formats | P0 | 🟡 | `crates/codecs/src/lib.rs`, `crates/raw/src/lib.rs`, `crates/raw/src/jxl.rs` | JPEG, PNG, TIFF (1- to 64-bit integer, 16- to 64-bit float, incl. bilevel and CCITT fax), WebP, JXL, PSD, GIF, BMP (lossy wide-gamut JXL decodes to the right colours: jxl-oxide desaturated XYB rendered to P3/Rec. 2020, worked around in `crates/codecs/src/jxl.rs`); DNG (incl. lossy / Smart Preview DNG and DNG 1.7 JPEG XL tiles/strips: lossless ones decode bit-exactly on synthetic CFA and LinearRaw files, lossy ones are restored to the declared linear primaries without clipping or gamut mapping, checked on one real file with 108 lossy tiles, and any tile that fails to decode makes the file preview-only; DNG 1.7 row/column-interleaved rasters (`RowInterleaveFactor` / `ColumnInterleaveFactor`) are undone before the mosaic is read, so a file from Adobe's converter with a 2×2 interleave no longer decodes as four scaled-down copies in the wrong colours; a dimension the factor does not divide decodes with short trailing fields; verified on 4 real ILCE-6400 JPEG XL DNGs rendering bit-identical to their non-interleaved twins, factors above 2 rest on the plain reading of the tag; a single-chunk JPEG XL preview IFD is offered as the embedded preview; a DNG whose samples pile up at one value well below its stated `WhiteLevel`, as a camera app's 12-bit Bayer DNG that states 4095 and clips at 3567, has those samples raised to the white level on decode, so highlight reconstruction sees the clipped areas instead of white balance tinting them magenta, issue #548, `crates/raw/src/saturation.rs`), CR2 (colour-filter layout from the file's `CR2CFAPattern` tag, issue #85), ARW (pre-2017 bodies: white balance and black level from the encrypted `SR2SubIFD`, issue #148, its `WB_RGGBLevels` being the white balance the camera applied, issue #535; the DSLR-A900's packed 12-bit strip, two pixels per three bytes, read only when the strip is exactly 1.5 bytes per pixel, with its camera-JPEG window centred, checked on one CC0 file (A850 unmeasured); downsized Sony lossless YCbCr 4:2:0 / 4:2:2 tiles decoded to linear RGB, verified on private ILCE-7M4 3:2 & 4:3 examples including 16-bit full-resolution export; Sony DSC-R1 .SR2 decodes, its big-endian 16-bit words read in the order that fits the sample range, checked on the CC0 3221 sample; its crop and white balance live in the SR2SubIFD and are not read yet; ARW6 Compressed / Compressed (HQ) of the ILCE-7RM6 (`crates/raw/src/vendor/arw6.rs`, `crates/raw/src/llvc.rs`; 12-bit codes exact against a black-box oracle on 8 CC0 files, FF over the full frame, APS-C in the interior (LibRaw's own edge rows differ); output through our own companding curve, measured from CC0 lossless / ARW6 pairs; geometry checked against the camera JPEG, `docs/arw6-compression.md`; the ILCE-7M5 writes the same codec, unverified)), NEF (uncompressed, lossless and lossy compressed 12/14-bit, `crates/raw/src/vendor/nefc.rs`), RAF (uncompressed, lossless/lossy compressed Bayer and X-Trans; `crates/raw/src/vendor/rafc.rs`, full sensor verification on 13 bodies, `docs/raf-compression.md`), RW2 / Leica RWL / Panasonic RAW in every raw format (compressed 4 and 6, the prefix-coded strips of format 8 from the GH6 on, packed 2/5/7, the 16-bit words of the 2005–2007 bodies; black levels, in-camera aspect crops and mapped-out defect pixels; 178 CC0 files from 118 bodies checked, `crates/raw/src/vendor/rw2.rs`), PEF, ORF (uncompressed; colour-filter layout from the file's Exif `CFAPattern`; 12.8 bit/px 16-byte blocks of ten 12-bit samples + a zero pad byte, E-300 / E-330 / E-500 verified on CC0 files, E-M5 Mark II / PEN-F high-res files decode smooth but CFA and black unverified), Kodak DCS520C TIFF (a two-component 12-bit lossless JPEG strip, the two components the even and odd columns; the file's `GrayResponseCurve` table linearises the companded samples to 12 bits, black measured per CFA position, white balance from the `KodakIFD`; `RawFormat::KodakDcs`, `crates/raw/src/vendor/kodak.rs`, checked on the one CC0 sample against its IFD0 thumbnail), Hasselblad 3FR and FFF (a TIFF without a DNG version tag that describes its CFA IFD, levels, crop and white balance with DNG's tags; `RawFormat::CfaTiff`, read by `dng::decode_as`, RGGB when the file states no `CFAPattern`): uncompressed (X1D, X1D II, X2D, CFV 100C) and Hasselblad's lossless JPEG with scan selection value 8 (every FFF; H3D, H4D and CFV-50c 3FR), `ljpeg::decode_hasselblad`, its rule measured on 14 CC0 files with the ljpeg-explorer tool, Mamiya MEF (ZD: an uncompressed 12-bit packed CFA sub-IFD; crop is its RGB preview's window, white balance from that preview's neutral pixels; no JPEG preview, so it renders with the neutral starting look; `crates/raw/src/vendor/mef.rs`, 1 CC0 file), Epson ERF (R-D1, R-D1s, R-D1x: a CFA sub-IFD of 12-bit samples in 16-byte blocks, ten MSB-first samples and a pad byte; maker-note black levels and picture size, the crop registered against the preview; no white-balance tag was found, so the as-shot gains are measured from the preview's neutral pixels, grey world without them, `crates/raw/src/wb_estimate.rs`; file-local look fitted to the preview; `crates/raw/src/vendor/erf.rs`, 3 CC0 files), Samsung SRW without compression (NX5, NX10, NX11 and the NX20-generation bodies NX20, NX200, NX210, NX1000 and NX1100 as 12-bit packed samples in either bit order, EX1 and WB2000 as 16-bit words; layout, camera-JPEG framing, levels and white balance from the maker note, `crates/raw/src/vendor/srw.rs`; median ΔE vs the camera JPEG 2.2–7.6 on 11 of the 12 files from 10 bodies checked, 10.7 (5.7 registered) on the backlit WB2000 sample). 12-bit NEF black level: maker note `0x003d` is in 14-bit units (D750, D780, D850, D7500, Z 50 checked). Lossy type 2 NEF curves of version `0x44 0x40` (D780, D6, Z 5, Z 6, Z 7, Z 7_2) span a quarter of the sample range, read from the table's own point spacing. Import probes (`probe_info`) of compressed NEFs decode only the first 128 rows, the ones the masked-trailing-column test reads in both the probe and the full decode (the D5100 and D7000 write 8 masked columns at 0 with no maker-note tag for them, compressed and uncompressed alike), instead of the whole Huffman stream: ~3 ms instead of the full decode time per file (386 ms on a 24 MP D750 file), issue #708. CR3 lossless CRX Bayer and version 0x100/0x200 C-RAW decodes to sensor pixels with timed white balance, black/white levels and file crop (the shot's aspect ratio from the maker note's `AspectInfo`); full sensor samples match the reference on M50/R100/R8 (`crates/raw/tests/cr3_corpus.rs`, `docs/cr3.md`). EOS R5 Mark II C-RAW and RAW decode too (the QP map's first-symbol literal and 23-zero escape, odd-height Bayer planes): 4 CC0 files pinned, every QP map of 33,665 private C-RAW files decodes exactly, and full-frame images match the camera JPEG. Unsupported coding variants retain metadata and use the embedded JPEG when available; HEVC preview decoding remains unsupported. Missing: CR3 unverified CRX variants, compressed ORF, compressed Samsung SRW (NX1, NX30, NX300, NX500, NX2000, NX3000, NX3300, NX mini: preview only with the reason), NEFs labelled compressed (34713) but stored uncompressed without a `0x0096` table (Z 6 packed 14-bit, D850 12-bit uncompressed), Nikon High Efficiency NEF (HE / HE★ from the Z 8, Z 9, Z 6III and Z f: compression 34713 with a JPEG XS codestream and no `0x0096` table; no public specification, so preview only with the reason "Nikon High Efficiency NEF", issue #193; Lossless compressed NEFs from the same bodies decode), NEF "lossy after split" (preview only: imported with `preview_only` = the decoder's reason, rendered as a rendered JPEG, flagged by a grid badge and loupe/Edit/Info notices, `previewOnly` in `catalog.query`; Reload clears it once the file decodes), TIFF-based raws whose raw data sits in a private block (Phase One / Leaf IIQ, Canon EOS-1D / 1Ds and the Kodak DCS Pro / DCS760C TIFFs (compression 65000): IFD0 is only a reduced RGB image next to a much larger declared picture) are recognised from that structure and import as `preview_only` with the reason, instead of opening as a thumbnail-sized ordinary image (`thumbnail_shell` in `crates/raw/src/lib.rs`), Recognised raws LightCraft cannot decode open as `preview_only` with any usable embedded JPEG, also Canon CRW, Minolta MRW and Sigma X3F (containers recognised by magic, preview found by a structural JPEG scan), Kodak KDC (IFD0 without `ImageWidth`) and Leaf MOS (scan), and any decode failure of a recognised raw, not only an unsupported variant; ones with no JPEG still fail with "without an embedded preview", AVIF decode (HEIC decodes only behind the non-default `heif` feature, which the release packages enable: `crates/heif`, heic-rs for the container and HEVC (bit-exact against libde265 on iPhone tiles) plus our own colour conversion, matching libheif within 1 code value on iPhone-style grids (VUI full range, Display P3 ICC, nclx, 10-bit, irot/imir/clap, gain map/depth ignored); 4:2:0/monochrome only, 4:2:2/4:4:4 Canon/Sony HIF refused; same policy as PhotoCraft), palette (indexed-colour) TIFF (refused by the `tiff` crate) |
 | LR-IMP-CAMERA-COVERAGE | Camera coverage, verified per model | P0 | 🟡 | `crates/raw/tests/corpus.rs`, `xtask/src/main.rs` | a supported container is not the same as every camera that writes it decoding correctly: ~55 CC0 corpus files plus 6 exact-sensor CR3 cases and 4 pinned EOS R5 Mark II files (plus ~60 NEFs checked by hand and 178 Panasonic / Leica RW2, RWL and RAW files from 118 bodies, checked against each file's own JPEG) against the >1,000 models Lightroom lists; per-model differences still surface (e.g. the CR2 colour-filter layout differed by model until it was read from the file's own tag, issue #85, checked on 35 CR2 bodies; CR2 black levels were read from border columns light already reaches, left of `SensorInfo`'s border, so CR2s rendered dark with crushed shadows (EOS 6D: 2591 instead of 2047), now measured from the masked columns only, checked on 8 corpus bodies; pre-2017 Sony ARWs opened green until their scrambled white balance / black level were read, issue #148, checked on 16 ARWs from 15 Sony bodies; their white balance now comes from the encrypted `SR2SubIFD`'s `WB_RGGBLevels`, the gains the camera applied, which 14 bodies (DSLR-A450 … A700, NEX-3/5/C3, SLT-A33/A35/A55, ILCE-6001, UMC-R10C) had no other source for and which the maker-note estimate read before missed by up to 100 % on preset shots, issue #535, checked against ExifTool on 100 decoded ARWs from 87 Sony bodies; the encrypted SR2 black level is now read from its directory entry (the DSLR-A450/A500/A550/A700 read 354–975 instead of 512), checked on 126 ARWs from 97 Sony bodies, and downsized lossless M/S ARWs use their measured black level 1024 instead of 512, checked on 12 files from 4 bodies, issue #535, and on a fifth, the ILCE-7CM2 (issue #697: 0.5.0 rendered its lossless M file with that 512 pedestal, the darkest half of a dusk scene +11 L* and blue, the lamplight white; its darkest 0.1 % per channel sits at 1017/1020/1024, and with 1024 the render is within +3 L* of the camera JPEG; the body's compressed and uncompressed "M-size" files are Bayer at 4736×3132 with black 512, two public ones in the corpus); pre-2017 Sony bodies shot in the camera's 16:9 mode (ILCE-7SM2, DSLR-A580) now get the 16:9 crop of their camera JPEG instead of the whole 3:2 frame with padding columns, issue #535; Canon PowerShot and EOS M CR2s whose `ColorData` is stored as bytes opened green until the bytes were read as 16-bit words, 25 files from 25 bodies checked). Compressed RAF sensor arrays verified on 13 Fujifilm bodies (`docs/raf-compression.md`). ILCE-7RM6 ARW6 12-bit codes verified on 8 CC0 files (FF and APS-C, both compression modes). Sony ILCE-7CR (61 MP): lossless compressed L and M and compressed ARW2 samples of one scene in the corpus (black level, default crop, as-shot gains, lossless vs compressed mosaic agreement, fitted camera look), and all nine public codings (also uncompressed, small and APS-C crop) decode and fit. Grow the CC0 corpus per model and test each sample decodes with plausible colour. Nikon CropArea and untagged-preview colour-space regression tests; private Z 8 crop verified; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone). |
 | LR-IMP-PREVIEW-READ | Preview reads the header, not the raw | P0 | ✅ | `crates/raw/src/preview.rs` (`bounded_preview`, `embedded_preview_from_range`), `crates/engine/src/files.rs` (`preview_window`), `docs/raw-preview-reads.md` | a grid thumbnail and a loupe preview of an unedited raw show the camera's embedded JPEG, which sits near the start of the file (a 24 MP Fuji RAF keeps its 5.6 MB JPEG in a 56 MB file), so the preview loader reads the header and that JPEG instead of the whole file: 56.5 MB → 5.9 MB and ~10 s → 0.96 s measured on one real RAF over a GVFS/SMB Wi-Fi share (byte-identical preview pixels; `LIGHTCRAFT_PROFILE=1` reports the bytes); the RAF pointer is read from its fixed header fields, formats whose preview only the whole file reveals (CR3 boxes, TIFF pointer tags past the prefix, CRW/MRW/X3F scans) keep the whole-file path, and a lying pointer, a short read or a file that changes underneath us falls back to it rather than losing the preview. An unedited raw's **grid thumbnail is that camera JPEG itself**, so no sensor decode is scheduled behind it (`Session::embedded_thumb_is_final`, `grid::skips_the_real_render`): drawing a 512 px thumbnail used to decode the whole raw — 45 s a photo at 1.2 MB/s, 8.3 GB for a 149-raw folder — and the queue it built delayed the render the user was waiting for; a cached render as stand-in, an edited photo and a raw without an embedded JPEG still render |
 | LR-IMP-CULL-AT-IMPORT | Culling analysis at import | P2 | 🟡 | `cmd:photo.analyze` | run Assisted Culling on the imported photos (they're selected after an import); not automatic |
@@ -787,6 +787,7 @@ Latin stays upright. Advanced Japanese composition remains open. Regression cove
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-12 | minor | LR-IMP-FORMATS: Mamiya MEF decodes from sensor data and is imported (`vendor/mef.rs`) |
 | 2026-10-12 | minor | LR-IMP-FORMATS: Epson ERF decodes from sensor data (`vendor/erf.rs`), no longer preview-only |
 | 2026-10-11 | minor | KEY-SLIDER-TYPE: honor immediate Return/Escape and keep typed keys in the value editor; add regression references |
 | 2026-10-11 | minor | LR-PROF-CAMERACOLOR: raws with a black-and-white camera JPEG take its tone curve (issue #577) |
diff --git a/docs/raw-parity.md b/docs/raw-parity.md
index 18d087a04..31dce107d 100644
--- a/docs/raw-parity.md
+++ b/docs/raw-parity.md
@@ -1,6 +1,6 @@
 # RAW parity: cameras, formats, demosaic, colour and lens profiles
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Epson ERF decoded: 3 bodies verified) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6 (Camera Raw 18.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Mamiya MEF decoded: ZD verified) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6 (Camera Raw 18.7)
 
 Raw processing is the deepest single dimension of Lightroom parity: a photographer whose camera
 does not decode, or decodes with the wrong colour, cannot switch. This document measures it model by
@@ -14,10 +14,10 @@ ranked in [gaps.md](gaps.md). Details per format: [cr3.md](cr3.md),
 | Measure | Value | Kind |
 |---|---:|---|
 | Adobe-listed camera models | **1,446** | measured: [raw/adobe-cameras.tsv](raw/adobe-cameras.tsv) |
-| Decoded from sensor data and **verified** on a real file | **238** (16%) | measured: [raw/evidence.tsv](raw/evidence.tsv) |
+| Decoded from sensor data and **verified** on a real file | **239** (17%) | measured: [raw/evidence.tsv](raw/evidence.tsv) |
 | Decoder path should handle it, **unverified** | **942** (65%) | measured from the format rules (632 of them DNG, mostly phones) |
 | **Preview-only** (embedded JPEG) | **230** (16%) | measured |
-| **Unsupported** (not imported, refused or decodes wrongly) | **36** (2%) | measured |
+| **Unsupported** (not imported, refused or decodes wrongly) | **35** (2%) | measured |
 | Models added since 2017 (Camera Raw 10+): verified / unverified / preview / unsupported | 82 / 640 / 24 / 8 of 754 | measured |
 | **Share of photographers whose camera fully works** (decodes from sensor data), use-weighted | **~85%** | estimated: measured classes × written usage weights × per-format confidence |
 | …of which on a body we have verified | **~42%** | estimated, same weights |
@@ -41,7 +41,7 @@ committed table is stale.
   `lightcraft_engine::import::EXTENSIONS`, and `KNOWN_UNSUPPORTED` in `crates/raw/tests/corpus.rs`. Doc
   claims were not used.
 - **Verified** means a real file from that body decoded from sensor data in: the corpus test over the
-  `RAW_SAMPLES` manifest (`xtask/src/main.rs`, 104 CC0 files; bodies whose sample is in
+  `RAW_SAMPLES` manifest (`xtask/src/main.rs`, 105 CC0 files; bodies whose sample is in
   `KNOWN_UNSUPPORTED` excluded), `crates/raw/tests/cr3_corpus.rs` (3 bodies exact against an external decoder;
   the EOS R5 Mark II pinned, with a QP-map check of 33,665 private files), the RAF reference
   check ([raf-compression.md](raf-compression.md)), and the raw.pixls.us bulk checks recorded in issue
@@ -76,12 +76,12 @@ committed table is stale.
 | Xiaomi, Oppo, LG, Huawei, OnePlus, Motorola, Nokia | 139 | 0 | 139 | 0 | 0 | — (DNG) |
 | Pentax / Ricoh | 60 | 4 | 56 | 0 | 0 | — |
 | Hasselblad | 34 | 0 | 2 | 32 | 0 | Hasselblad-compressed 3FR / FFF |
-| Phase One / Leaf / Mamiya | 59 | 0 | 0 | 43 | 16 | IIQ, MOS preview; TIFF raws and MEF not imported |
+| Phase One / Leaf / Mamiya | 59 | 1 | 0 | 43 | 15 | IIQ, MOS preview; TIFF raws not imported (MEF decodes) |
 | Casio | 26 | 0 | 26 | 0 | 0 | — (DNG) |
 | DJI | 21 | 0 | 21 | 0 | 0 | — (DNG) |
 | OM Digital Solutions | 7 | 0 | 0 | 7 | 0 | **compressed ORF** |
 | Kodak, Konica Minolta, Epson, Sigma, GoPro, Contax, others | 56 | 3 | 14 | 24 | 15 | DCR, GPR not imported; KDC, MRW, X3F preview (ERF decodes) |
-| **All** | **1,446** | **238 (16%)** | **942 (65%)** | **230 (16%)** | **36 (2%)** | |
+| **All** | **1,446** | **239 (17%)** | **942 (65%)** | **230 (16%)** | **35 (2%)** | |
 
 ## By use (estimated)
 
@@ -97,7 +97,7 @@ committed table is stale.
 | Pentax / Ricoh | 1.5% | 94% | 14% | |
 | Leica | 1% | 95% | 5% | |
 | DJI | 1% | 95% | 0% | |
-| Medium format and others | 0.5% | 24% | 2% | IIQ, 3FR, X3F |
+| Medium format and others | 0.5% | 25% | 2% | IIQ, 3FR, X3F |
 | **Weighted** | 100% | **85%** | **42%** | |
 
 About 5 in 6 raw photographers' cameras decode, but only about 2 in 5 use a body we have actually
@@ -146,7 +146,8 @@ checked, and Canon, the largest bucket, is the weakest of the big four.
 | 3FR / FFF | Hasselblad compression | ⬜ | preview |
 | ERF | 12-bit in 16-byte blocks (R-D1, R-D1s, R-D1x) | ✅ | 3 CC0 corpus files; crop registered and WB measured against the embedded preview (no WB tag found); `vendor/erf.rs` |
 | IIQ, MOS, MRW, KDC, X3F | all | ⬜ | preview |
-| DCR, MEF, MFW, DXO, GPR, TIFF raws | all | ⬜ | not imported |
+| MEF | uncompressed 12-bit (Mamiya ZD) | ✅ | 1 CC0 corpus file; crop and WB from its uncompressed RGB preview (no JPEG, no WB tag); `vendor/mef.rs` |
+| DCR, MFW, DXO, GPR, TIFF raws | all | ⬜ | not imported |
 
 ### Compressed ORF: a clean-room starting point
 
@@ -252,7 +253,7 @@ works, from [raw/usage-weights.tsv](raw/usage-weights.tsv).
 | 7 | Sony A100 and DSC-F828 regression (#702) | +0.1 | 1–2 | ~0.07 | samples on raw.pixls.us |
 | 8 | Canon CRW (2000–2004 bodies) | +1.2 by the uniform tail weight, far less by real use | 6–12 | ≤ 0.1 | samples |
 | 9 | Nikon HE / HE★ NEF (Z 8, Z 9, Z 6III, Z f, Z50II, Z5II set to HE) | +1.1 | 20–40 | ~0.04 | a pure-Rust JPEG XS decoder |
-| 10 | Compressed SRW, Hasselblad 3FR, IIQ, X3F, MRW, KDC, DCR, MEF, GPR (ERF done) | +0.6 together | 45–85 | ~0.01 | samples; low use |
+| 10 | Compressed SRW, Hasselblad 3FR, IIQ, X3F, MRW, KDC, DCR, GPR (ERF, MEF done) | +0.6 together | 45–85 | ~0.01 | samples; low use |
 
 Beyond decoding:
 
@@ -267,6 +268,7 @@ Beyond decoding:
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-12 | minor | Mamiya MEF decoded (`vendor/mef.rs`): ZD verified; 239 verified, 35 unsupported |
 | 2026-10-12 | minor | Epson ERF decoded (`vendor/erf.rs`): R-D1, R-D1s, R-D1x verified; 238 verified, 230 preview |
 | 2026-10-10 | minor | Compressed ORF: pointer to the two Olympus patents that describe the method, as a clean-room starting point |
 | 2026-10-11 | minor | EOS R5 Mark II verified (CRX QP-map first literal and limited-length escape, odd-height Bayer planes; 4 CC0 files pinned, QP maps of 33,665 private files): 235 verified, 942 unverified; use-weighted 85% (42% on verified bodies); decoding 77%, RAW readiness unchanged at ~56% |
diff --git a/docs/raw/coverage.py b/docs/raw/coverage.py
index d129c2bf8..c4552feee 100644
--- a/docs/raw/coverage.py
+++ b/docs/raw/coverage.py
@@ -83,6 +83,8 @@ def classify(maker, camera, ext_field):
                 return "preview", "SRW", "compressed SRW is not decoded"
             return "unverified", "SRW", "uncompressed / packed SRW"
     e = es[0] if es else ""
+    if e == "MEF":
+        return "unverified", "MEF", "MEF decoder (uncompressed 12-bit)"
     if e == "ERF":
         return "unverified", "ERF", "ERF decoder (12-bit 16-byte blocks)"
     if e in ("CRW", "3FR", "FFF", "IIQ", "MOS", "KDC", "MRW", "X3F", "RAW", "ORI"):
diff --git a/docs/raw/coverage.tsv b/docs/raw/coverage.tsv
index 1a0f57c3d..1910fcf48 100644
--- a/docs/raw/coverage.tsv
+++ b/docs/raw/coverage.tsv
@@ -673,7 +673,7 @@ Mamiya	Mamiya M18	TIF	2008	unsupported	TIF is not imported
 Mamiya	Mamiya M22	TIF	2008	unsupported	TIF is not imported
 Mamiya	Mamiya M31	TIF	2008	unsupported	TIF is not imported
 Mamiya	Mamiya DM40	MOS	2010	preview	MOS is opened from its embedded JPEG only
-Mamiya	ZD	MEF	2005	unsupported	MEF is not imported
+Mamiya	ZD	MEF	2005	verified	corpus: crates/raw/tests/corpus.rs (xtask RAW_SAMPLES)
 Motorola	Moto G Power (2021) Front Camera	DNG	2021	unverified	DNG decoder (uncompressed, LJ92, lossy, Deflate, JPEG XL, LinearRaw)
 Motorola	Moto G Power (2021) Rear Macro Camera	DNG	2021	unverified	DNG decoder (uncompressed, LJ92, lossy, Deflate, JPEG XL, LinearRaw)
 Motorola	Moto G Power (2021) Rear Wide Camera	DNG	2021	unverified	DNG decoder (uncompressed, LJ92, lossy, Deflate, JPEG XL, LinearRaw)
diff --git a/docs/raw/evidence.tsv b/docs/raw/evidence.tsv
index e4f66d78c..2fb0e38cb 100644
--- a/docs/raw/evidence.tsv
+++ b/docs/raw/evidence.tsv
@@ -251,3 +251,4 @@ Sony	ZV-E10	verified	issue #535: raw.pixls.us bulk check of all 100 Sony bodies
 Epson	R-D1	verified	corpus: crates/raw/tests/corpus.rs (xtask RAW_SAMPLES)
 Epson	R-D1s	verified	corpus: crates/raw/tests/corpus.rs (xtask RAW_SAMPLES)
 Epson	R-D1x	verified	corpus: crates/raw/tests/corpus.rs (xtask RAW_SAMPLES)
+Mamiya	ZD	verified	corpus: crates/raw/tests/corpus.rs (xtask RAW_SAMPLES)
diff --git a/docs/target-app-parity.md b/docs/target-app-parity.md
index f15a6e911..2333d62ad 100644
--- a/docs/target-app-parity.md
+++ b/docs/target-app-parity.md
@@ -1,6 +1,6 @@
 # Target-app parity: LightCraft vs Adobe Lightroom
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Epson ERF decoded: 3 models verified; headline numbers unchanged) · **Target:** Adobe Lightroom Classic 15.5 (August 2026) and Lightroom 9.6 (desktop)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Mamiya MEF and Epson ERF decoded; headline numbers unchanged) · **Target:** Adobe Lightroom Classic 15.5 (August 2026) and Lightroom 9.6 (desktop)
 
 The authoritative assessment of how close LightCraft is to Lightroom. The row-by-row checklist is
 [parity-checklist.md](parity-checklist.md); the ranked work list is [gaps.md](gaps.md); deep areas
@@ -297,6 +297,7 @@ P2 items 12–25 h; look tuning, performance, packaging, hardening 25–45 h.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-12 | minor | Mamiya MEF decoded (raw-parity.md): 239 verified, 35 unsupported; rounded numbers unchanged |
 | 2026-10-12 | minor | Epson ERF decoded (raw-parity.md): 238 models verified, 230 preview-only; shares and rounded numbers unchanged |
 | 2026-10-11 | minor | EOS R5 Mark II CR3 verified (raw-parity.md): use-weighted share whose camera decodes 84% → 85%, RAW decoding 76% → 77%; full 60.6% → 60.7%, mainstream depth 71.8% → 72.1%, essentials depth 77.4% → 77.5%; the rounded numbers (~61%, ~49%, ~64%) are unchanged |
 | 2026-10-10 | minor | RAW measured model by model (raw-parity.md): RAW decoding (76%) and colour (35%) are explicit rows of the full sum (59% → 61%); mainstream uses the use-weighted 84% plus a ×0.85 colour discount (51% → 49%); essentials uses 84% × colour 0.75 (63% → 64%); beta ~14 points |
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index b900136d1..e39d6bd79 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -888,6 +888,11 @@ const RAW_SAMPLES: &[(&str, &str, &str)] = &[
     ("erf-epson-rd1.erf", "https://raw.pixls.us/data/Epson/R-D1/_EPS0672.ERF", "09d8e533d93116294a9f3e161ed868e929454c7b946e083b644bd6bb75bcb5e4"),
     ("erf-epson-rd1s.erf", "https://raw.pixls.us/data/Epson/R-D1s/EPSN3575.ERF", "45bb0081baf1c813c7cd9e05b3e6ae734b90aba408dd1195118dc94dc6abbbb9"),
     ("erf-epson-rd1x.erf", "https://raw.pixls.us/data/Epson/R-D1x/_EPS1919.ERF", "fa1bff3e0b9b9a14f83b8db9fae022c2aca8d455896bf4f25f2c1a0034e295e6"),
+    (
+        "mef-mamiya-zd.mef",
+        "https://raw.pixls.us/data/Mamiya/ZD/RAW_MAMIYA_ZD.MEF",
+        "bcd63507c3c4cc3ea1bad2945e3f88cb4677a1a3c762e1acc38df4445714eb7c",
+    ),
 ];
 
 fn cmd_corpus(download: bool) -> Result<(), String> {