The D4 records no CropArea. Its 4992 x 3292 data keeps 2 columns of optical
black left of the image and 42 right of it (then 8 empty ones), which showed
as purple stripes on both sides; the camera's own 4928 x 3280 JPEG sits at
(8, 6). Green saturates at 15546-15672 while red and blue run on to 16383,
so the data's own top left clipped highlights magenta; one level of 15520
keeps them white without moving the white balance.
Measured on 148 uncompressed 14-bit NEFs from one body by aligning the
sensor data with the embedded camera JPEG.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
