Nikon DSLRs write no Exif LensModel, only the lens specification (maker note
0x0084, read into Metadata::lens_spec), so the lensfun-format lens database never
corrected their raws. A raw without a lens model is now looked up by a name built
from its specification ("24-70mm f/2.8", lightcraft_lensdb::spec_name), and a
profile is used only when one of its names is exactly that
(Profile::names_exactly): the specification fits every maker's lens with that
range, so a partial match or a maker-named entry is never taken. lensfun's own
database has no such names; a user aliases the one lens they own.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Raws without an embedded lens correction look their EXIF lens up in the
user-supplied database; the profile goes through the existing Enable Profile
Corrections path (amount sliders, CPU/GPU geometry stage, DNG export).
Synthetic-grid test renders a distorted chart through the pipeline.
Sources: own design (see lightcraft-lensdb for the model sources).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
