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Alex Chambers 5151457b99 craft-raw: Nikon Z 6 and Z 7 in-file distortion; modes 1 and 3 only

Ported from storytold/lightcraft#3796. The Z 6 and Z 7 join the bodies whose
NikonNEFInfo distortion becomes an OpcodeList3 warp. Three Z 6 and three Z 7
CC0 raw.pixls.us files (NIKKOR Z 24-70mm f/4 S) were matched against the
camera's embedded JPEG: the corrected radial median error is 0.88-0.96 px on
the Z 6 and 1.37-1.46 px on the Z 7, from 83-84 px and 124-125 px uncorrected.
The method and results are in crates/raw/docs/nikon-lens-corrections.md.

DistortionInfo's mode byte must now be 1 (On, optional) or 3 (On, required).
Mode 2 (Off) and unknown modes give no warp, where before only 0 was skipped,
so mode-2 files from the Z 6II, Z 8 and Z f no longer get a warp.

2026-11-14 12:20:57 +01:00

coverage

craft-raw: Canon CR3 (CRX), header plans and the remaining preview branches (#1070 )

2026-11-11 22:01:07 -05:00

arw6-compression.md

craft-raw: Sony ARW, ARW6, SR2 and lens corrections (#1051 )

2026-11-11 21:42:48 -05:00

cr3.md

craft-raw: Canon CR3 (CRX), header plans and the remaining preview branches (#1070 )

2026-11-11 22:01:07 -05:00

nikon-lens-corrections.md

craft-raw: Nikon Z 6 and Z 7 in-file distortion; modes 1 and 3 only