LR-EDIT-OPTICS-PROFILE: Apply Nikon's in-file distortion correction for the Z 6II, Z 8 and Z f

Read the polynomial, zoom and optical center offset from NikonNEFInfo.

docs/gaps.md

@@ -1,6 +1,6 @@
 # Gaps: where LightCraft falls short of Lightroom
 
-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-11 · **Change:** minor (gap 10: Leica Q3 verified, 236 models; 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:** 2026-10-13 · **Change:** minor (gap 8: Nikon Z 6II / Z 8 / Z f in-file distortion; gap 10: Leica Q3 verified, 236 models; 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
@@ -22,7 +22,7 @@ Hours are Opus 5.5 agent wall-clock hours (see [target-app-parity.md](target-app
 | 5 B | **AI masks: Subject, Sky, People, Background, Landscape** are heuristics; Object / Describe run SAM 3 but its download has no mirror configured | `crates/segment`; ai-masks.md; MASK rows 67% | masking is how most Lightroom users edit today | 40–70 + model decision | [target-app-parity](target-app-parity.md#ai) |
 | 6 B | **Compressed ORF** (every Olympus / OM body since ~2008) | measured: 66 of 78 Olympus / OM models preview-only; `orf.rs` refuses; OM bucket 3% of photographers, 3% of them fully work | +2.6 points; best gain per hour of any raw gap (~0.2) | 8–15 | [raw-parity](raw-parity.md#compressed-orf-a-clean-room-starting-point) (the two Olympus patents that describe the method) |
 | 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) |
+| 8 B | **No lens profile database** (LR-EDIT-OPTICS-PROFILE): only DNG opcodes, RW2 in-file distortion, Sony ILCE-7RM4A distortion and Nikon Z 6II / Z 8 / Z f distortion (`docs/nikon-lens-corrections.md`) | 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**: 236 of 1,446 Adobe models verified (16%), ~42% of photographers on a verified body; Nikon 5 bodies verified, Canon 12, Leica 14 (the Q3 by a recorded check of 38 private DNGs). 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**: 236 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) |
@@ -92,3 +92,4 @@ Beta-blocking gaps (B) total **~230–430 h**; with the stability and platform w
 | 2026-10-10 | minor | RAW gaps re-measured model by model (raw-parity.md): CR3, compressed ORF and verification entries carry measured shares; HE NEF no longer a beta blocker (+1.1 points for 20–40 h); verification entry absorbs the cheap per-body fixes (#769, #702, A200 series) |
 | 2026-10-10 | minor | Beta total raised to 340–600 h to include the ~92 open core-path user issues |
 | 2026-10-10 | major | Created from the checklist's Top gaps (whose items 1–2 had been duplicated by a merge) and ROADMAP's Where we stand; re-ranked; added evidence, impact, hours and beta flags; added platform-CI, lens-database, HE NEF and localization gaps |
+| 2026-10-13 | minor | Gap 8 narrows: Nikon Z 6II / Z 8 / Z f NEFs use the camera's in-file distortion correction (`docs/nikon-lens-corrections.md`) |

docs/lens-profiles.md

@@ -1,7 +1,7 @@
 # Lens profiles from a lens database
 
 Raws that carry no lens correction of their own (DNG `OpcodeList3`, or a camera correction a raw reader converts,
-see [sony-lens-corrections.md](sony-lens-corrections.md)) can be corrected from a **lens database in the lensfun
+see [sony-lens-corrections.md](sony-lens-corrections.md) and [nikon-lens-corrections.md](nikon-lens-corrections.md)) can be corrected from a **lens database in the lensfun
 XML format** that you supply. The app does not ship any lens database: lensfun's data is licensed CC-BY-SA 3.0 and
 stays a separate download. Adobe LCP profiles are never used.
 

docs/nikon-lens-corrections.md

@@ -0,0 +1,101 @@
+# Nikon embedded distortion corrections
+
+Nikon writes its own distortion correction into NEFs from its mirrorless bodies, in the raw SubIFD tag `0xc7d5`
+(NikonNEFInfo). LightCraft reads it for the NIKON Z 6_2 (Z 6II), the NIKON Z 8 and the NIKON Z f and turns it into an
+`OpcodeList3` `WarpRectilinear`, so it goes through the same profile correction control, optics path, orientation
+handling and DNG export as the other embedded corrections. Other bodies are left alone for now even if they have the
+same tag, because I've only checked files from these three.
+
+This is distortion only. The vignetting block (`0x0006`) and what looks like lateral CA (`0x0007`) aren't applied
+yet. Like the Sony, Fujifilm and Panasonic corrections it's on by default and can be turned off under Lens
+Corrections.
+
+## Where the data comes from
+
+The [ExifTool Nikon tag names](https://exiftool.org/TagNames/Nikon.html) give the names of NikonNEFInfo and its
+DistortionInfo entry (`0x0005`): DistortionCorrection and RadialDistortionCoefficient1 to 3. Nothing else was taken
+from other software. The rest was worked out by comparing LightCraft's uncorrected render of each NEF with the
+full-size JPEG the camera embeds in it. That JPEG is always distortion-corrected with Z lenses ("On (Required)"), and
+with other lenses when Auto distortion control is on. The comparison matched textured patches between the two images
+(normalised cross-correlation on the green channel at quarter size).
+
+NikonNEFInfo starts with `"Nikon\0"` and a 4-byte version, followed by a small TIFF stream. The two entries used here:
+
+| Entry | Bytes | What it holds |
+|---|---|---|
+| `0x0005` DistortionInfo | 0–3 | `"0100"` |
+| | 4 | correction mode: 1 "On (Optional)", 3 "On (Required)", 0 none |
+| | 8–15 | normalisation radius in mm, a signed rational. It's 21.6 (the FX half diagonal) in every file I looked at |
+| | 16–19 | number of terms, 4 |
+| | 20, 28, 36 | the three coefficients, called `k1`, `k2`, `k3` here after ExifTool's names |
+| | 64–71 | the zoom `q` the camera uses to fill the frame |
+| `0x0008` | 0–3, 4–11, 12–19 | `"0100"`, then the optical center's offset from the center of the image area in pixels (x right, y down) |
+
+The `0x0008` offset is where the in-body stabilization left the sensor. It's zero with a VR lens, since the lens does
+the stabilizing, and up to about 100 px with the Z lenses. The center of the distortion measured in the JPEG follows
+it closely, for example (−90.1, +18.6) recorded and (−91.2, +17.5) measured.
+
+From an output pixel to the raw, around the optical center, the mapping is
+
+```
+rho    = r_out / half diagonal of the image area
+r_src  = r_out * (1 + k3*rho^2 + k2*rho^4 + k1*rho^6) / (1 + q)
+```
+
+So the stored order goes from the highest power down. Reading them the other way round (`k1` with `rho^2`) doesn't fit
+the JPEG at all. `q` really is the zoom: fitting a separate zoom for every file gives `1 / (1 + q)` to four decimals
+(0.9675 fitted and 0.9676 from `q` on one of them), so nothing is fitted per file. The decoder turns this into DNG
+terms the same way `docs/sony-lens-corrections.md` describes for Sony, with the center in active-area coordinates and
+the coefficients rescaled to the farthest corner of the active area.
+
+## How well it matches
+
+I checked it on 83 of my own Z 6II photos with three lenses between 20 and 200 mm, 45 Z 8 photos (below), plus the
+CC0 Z f sample in the corpus. The numbers are the radial error against the camera JPEG at full size (6048 px wide), out to 0.95 half
+diagonals:
+
+| Lens | Focal length | Frames | Uncorrected median / p95 | Corrected median / p95 |
+|---|---:|---:|---:|---:|
+| VR 70-200mm f/2.8G (F-mount, FTZ) | 70 mm | 11 | 10.9 / 15.9 px | 0.19 / 0.57 px |
+| VR 70-200mm f/2.8G (F-mount, FTZ) | 105–140 mm | 15 | 34–42 / 38–46 px | 0.13–0.18 / 0.59–0.90 px |
+| VR 70-200mm f/2.8G (F-mount, FTZ) | 175–200 mm | 21 | 45–46 / 50–51 px | 0.10–0.18 / 0.48–0.95 px |
+| NIKKOR Z 24-70mm f/4 S | 70 mm | 8 | 126.4 / 141.2 px | 0.48 / 4.38 px |
+| NIKKOR Z 24-70mm f/4 S | 38–59 mm | 6 | 59–101 / 69–121 px | 0.36–0.76 / 4.6–6.8 px |
+| NIKKOR Z 24-70mm f/4 S | 33–34 mm | 4 | 32–44 / 43–53 px | 1.0–1.3 / 8.5–9.6 px |
+| NIKKOR Z 24-70mm f/4 S | 24 mm | 7 | 16.0 / 105.6 px | 6.90 / 23.56 px |
+| NIKKOR Z 20mm f/1.8 S | 20 mm | 5 | 8.2 / 53.9 px | 1.49 / 5.46 px |
+| Tamron 35-150mm (Z f, CC0 corpus) | 150 mm | 1 | 70.4 px median | 0.22 px median |
+
+On the Z 8 (8256 px wide JPEGs) it looks the same. The 70-200 f/2.8G on the FTZ matches within 0.14 to 0.21 px median
+at 70, 135 and 200 mm. The NIKKOR Z 24-120mm f/4 S is within 0.6 to 1.0 px median from 36 to 120 mm and 1.5 px at 24
+to 28 mm, with the same kind of error toward the edges at the wide end as the Z lenses on the Z 6II. A few 14-24mm
+f/2.8G frames had Auto distortion control off, so their JPEGs aren't corrected and match about the same either way.
+
+I also rendered a few with `lightcraft-cli render` at default settings and measured those against the camera JPEG.
+The median error was 0.10 px for the 70-200 at 200 mm and 0.12 px for the Z f sample. The 24-70 was 0.32 px at 70 mm,
+on a frame with a 92 px sensor shift, and 8.4 px at 24 mm. The 20 mm came out at 1.3 px. On the Z 8 it was 0.14 px for the 70-200 at 200 mm, 0.45 and 0.68 px for the 24-120
+at 68 and 120 mm, 1.8 px for the Z 20 mm and 3.7 px for the 24-120 at 24 mm. That checks the
+center, crop and DNG conversion along with the model itself.
+
+The F-mount lens on the FTZ matches about as well as I can measure. The native Z lenses still have a smooth error
+toward the edges that doesn't depend on the sensor shift and is the same in every frame at a given focal length: about
++22 px at 0.7 to 0.9 half diagonals at 24 mm, +8 px at 33 mm and +3.5 px at 70 mm. It seems the camera applies an
+extra correction for Z lenses that isn't in the readable coefficients. NikonNEFInfo `0x000e` looks encrypted and I
+didn't try to decode it. Even so, the readable correction takes most of the distortion out. At 24 mm the error at 0.7
+half diagonals goes from −82 px to +25 px, and at 70 mm from about −137 px to under 4 px.
+
+## What's left out
+
+Only `NIKON Z 6_2`, `NIKON Z 8` and `NIKON Z f` are corrected, matched exactly. A matching tag on another body doesn't tell us its
+pixel pitch or image area, so other bodies can be added once someone checks their files. Only the full-frame 3:2
+image area is corrected, because the stored 21.6 mm radius is the FX half diagonal, so DX and other crops are skipped.
+The decoder also skips data it doesn't recognise (another layout, radius or term count, or no correction mode),
+values that are clearly wrong (coefficients past ±1, a zoom past ±0.5, a sensor shift over 5% of the frame) and any
+mapping that folds back on itself before the farthest corner.
+
+The tests in `nef_lens` cover the polynomial and zoom, the sensor-shift center and refusing other bodies, layouts
+and crops. `nikon_in_file_distortion_becomes_a_warp` runs a synthetic Z 6II NEF through the header and full decode
+and a DNG export. `nikon_in_file_distortion_is_limited_to_validated_bodies` checks the corpus: the Z f sample gets the
+warp and the D5100, D7000, D7500 and Coolpix B700 samples don't.
+
+None of my photos, crops or reference images are committed, only the numbers above.

docs/parity-checklist.md

@@ -1,6 +1,6 @@
 # Lightroom parity checklist
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-11 · **Change:** minor (LR-MERGE-HDR: merges of raws without colour matrices keep their colour (#965); 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:** 2026-10-13 · **Change:** minor (LR-EDIT-OPTICS-PROFILE: Nikon Z 6II / Z 8 / Z f in-file distortion correction; LR-MERGE-HDR: merges of raws without colour matrices keep their colour (#965); 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
@@ -211,7 +211,7 @@ differences and missing bindings are in [ui-parity.md](ui-parity.md#shortcuts).
 | LR-EDIT-DETAIL-SUPERRES | Super resolution | P2 | ⬜ | | |
 | LR-EDIT-DETAIL-AISHARPEN | AI sharpen | OOS | 🚫 | | |
 | LR-EDIT-OPTICS-CA | Remove chromatic aberration | P1 | ✅ | `crates/ui-egui/src/panels/edit.rs` (checkbox), `ctl:optics.caRed`, `ctl:optics.caBlue` | |
-| LR-EDIT-OPTICS-PROFILE | Lens profile corrections | P1 | 🟡 | `ctl:optics.profileDistortion`, `ctl:optics.profileVignetting`, `crates/pipeline/src/optics.rs`, `crates/raw/src/vendor/rw2.rs`, `crates/raw/src/vendor/raf_lens.rs`, `crates/engine/src/crs.rs` | uses corrections embedded in the file: DNG `WarpRectilinear` / `WarpRectilinear2` (opcode 14, DNG 1.6: degree-14 radial polynomial, valid-radius clamp, reciprocal option, applied in list order with the spec's skip rule for a `WarpRectilinear` after an optional one, so Pixel DNGs' two-stage warp is corrected; up to 3 chained stages, sampled on the CPU because the polynomials need `f64`; issue #635) / `FixVignetteRadial`, and the camera's own distortion correction in Panasonic / Leica RW2 / RWL files (tag `0x0119`, read as the equivalent `WarpRectilinear`; on 79 photos from 13 bodies and 11 lenses the corrected render lines up with the camera JPEG within 0.75 px at 1440 px at the corners, from up to 13 % of the half diagonal uncorrected; issue #256); an imported preset's `LensProfileEnable=0` leaves them on, as Lightroom applies built-in corrections regardless (inferred); Sony ILCE-7RM4A Bayer ARW raw-IFD distortion tables (`0x7037`, 16-sample layout, native 3:2 framing) use the same warp path, enabled only for the independently validated ILCE-7RM4A with FE 24–105 and FE 200–600 lenses; other Sony models remain uncorrected (see `docs/sony-lens-corrections.md`); Fujifilm RAF raw-IFD tables (`0xf00b` distortion, `0xf010` vignetting; `crates/raw/src/vendor/raf_lens.rs`, `docs/fuji-lens-corrections.md`) become a `WarpRectilinear` with the camera's frame-filling zoom and a `FixVignetteRadial` gain for 59 body models with sample files checked against the camera JPEG (the table indexed by the source radius with last knot at the corner; on 67 body/lens combinations the corrected render's radial shape error against the camera JPEG falls from a median of 0.72 % to 0.05 % of the half diagonal, largest 0.42 %, and the vignetting gain of the JPEG tracks the table at a median correlation of 0.987); files whose table scale is not the recorded image's half diagonal (X-S20, X-T30 III, X-M5, X-T5 crops) and six unmatched bodies stay uncorrected; Fujifilm's lateral CA table (`0xf00f`) is real but is not applied, because our demosaic already registers the planes and the stored shift over-corrects; vignetting and lateral CA data of Olympus and Sony raws not read yet; Reload from Disk reads the file's lens data for photos catalogued without it and turns the correction on for those still at import settings (issue #314); lens-profile database: a lensfun-format XML database in `LIGHTCRAFT_LENSFUN_DIR` (none is bundled) supplies distortion (poly3 / poly5 / PTLens), TCA and vignetting for lenses it lists (`crates/lensdb`, `crates/engine/src/lens_profiles.rs`, `docs/lens-profiles.md`); no settings switch or bundled database yet |
+| LR-EDIT-OPTICS-PROFILE | Lens profile corrections | P1 | 🟡 | `ctl:optics.profileDistortion`, `ctl:optics.profileVignetting`, `crates/pipeline/src/optics.rs`, `crates/raw/src/vendor/rw2.rs`, `crates/raw/src/vendor/raf_lens.rs`, `crates/engine/src/crs.rs` | uses corrections embedded in the file: DNG `WarpRectilinear` / `WarpRectilinear2` (opcode 14, DNG 1.6: degree-14 radial polynomial, valid-radius clamp, reciprocal option, applied in list order with the spec's skip rule for a `WarpRectilinear` after an optional one, so Pixel DNGs' two-stage warp is corrected; up to 3 chained stages, sampled on the CPU because the polynomials need `f64`; issue #635) / `FixVignetteRadial`, and the camera's own distortion correction in Panasonic / Leica RW2 / RWL files (tag `0x0119`, read as the equivalent `WarpRectilinear`; on 79 photos from 13 bodies and 11 lenses the corrected render lines up with the camera JPEG within 0.75 px at 1440 px at the corners, from up to 13 % of the half diagonal uncorrected; issue #256); an imported preset's `LensProfileEnable=0` leaves them on, as Lightroom applies built-in corrections regardless (inferred); Sony ILCE-7RM4A Bayer ARW raw-IFD distortion tables (`0x7037`, 16-sample layout, native 3:2 framing) use the same warp path, enabled only for the independently validated ILCE-7RM4A with FE 24–105 and FE 200–600 lenses; other Sony models remain uncorrected (see `docs/sony-lens-corrections.md`); Nikon NEF distortion from NikonNEFInfo (`0xc7d5`: polynomial, frame-filling zoom and the optical-centre offset left by in-body stabilisation; `crates/raw/src/vendor/nef_lens.rs`, `docs/nikon-lens-corrections.md`) for the Z 6II, Z 8 and Z f, full-frame image area only: F-mount lenses on the FTZ match the camera JPEG within 0.2 px median, Z lenses within 0.5–1.5 px except the 24-70 f/4's wide end, where the camera applies a further correction that is not in the readable data (7 px median at 24 mm, from 16 px / 106 px p95 uncorrected); Fujifilm RAF raw-IFD tables (`0xf00b` distortion, `0xf010` vignetting; `crates/raw/src/vendor/raf_lens.rs`, `docs/fuji-lens-corrections.md`) become a `WarpRectilinear` with the camera's frame-filling zoom and a `FixVignetteRadial` gain for 59 body models with sample files checked against the camera JPEG (the table indexed by the source radius with last knot at the corner; on 67 body/lens combinations the corrected render's radial shape error against the camera JPEG falls from a median of 0.72 % to 0.05 % of the half diagonal, largest 0.42 %, and the vignetting gain of the JPEG tracks the table at a median correlation of 0.987); files whose table scale is not the recorded image's half diagonal (X-S20, X-T30 III, X-M5, X-T5 crops) and six unmatched bodies stay uncorrected; Fujifilm's lateral CA table (`0xf00f`) is real but is not applied, because our demosaic already registers the planes and the stored shift over-corrects; vignetting and lateral CA data of Olympus and Sony raws not read yet; Reload from Disk reads the file's lens data for photos catalogued without it and turns the correction on for those still at import settings (issue #314); lens-profile database: a lensfun-format XML database in `LIGHTCRAFT_LENSFUN_DIR` (none is bundled) supplies distortion (poly3 / poly5 / PTLens), TCA and vignetting for lenses it lists (`crates/lensdb`, `crates/engine/src/lens_profiles.rs`, `docs/lens-profiles.md`); no settings switch or bundled database yet |
 )
 | LR-EDIT-OPTICS-DEFRINGE | Defringe | P1 | ✅ | `ctl:optics.defringe*` | no fringe eyedropper |
 | LR-EDIT-OPTICS-MANUAL | Manual distortion / vignetting | P1 | ✅ | `ctl:optics.distortion`, `ctl:optics.vignetting`, `ctl:optics.vignettingMidpoint` | |
@@ -806,6 +806,7 @@ Latin stays upright. Advanced Japanese composition remains open. Regression cove
 | 2026-10-12 | minor | LR-IMP-FORMATS: the Hasselblad Lunar (a Sony NEX-7 ARW under Make HASSELBLAD) decodes from sensor data instead of opening as its preview; an uncompressed Leaf MOS imports as a preview-only raw instead of a greyscale image of its mosaic (#1275); status unchanged (🟡) |
 | 2026-10-12 | minor | LR-HDR-EXPORT, LR-EXP-HDR: HLG AVIF export (`hdrTransfer`); LR-VIEW-HDR-DISPLAY: tested SDR/HDR display decision |
 | 2026-10-12 | minor | LR-EXP-PSD, MENU-FILE-PHOTOSHOP: Photo ▸ Edit In ▸ Open Original in Other Editor (RAW, no copy) hands the original files (the raws themselves) to the other editor in one start; statuses unchanged |
+| 2026-10-13 | minor | LR-EDIT-OPTICS-PROFILE: Nikon Z 6II / Z 8 / Z f NEFs use the camera's in-file distortion correction (NikonNEFInfo); status unchanged (🟡) |
 | 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) |
 | 2026-10-11 | minor | LR-VIEW-ZOOM and LR-VIEW-COMPARE: Compare and Reference are sharp at 1:1 (zoom windows per pane, two originals kept decoded while they are open); statuses unchanged |

docs/raw-parity.md

@@ -1,12 +1,12 @@
 # RAW parity: cameras, formats, demosaic, colour and lens profiles
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-11 · **Change:** minor (Leica Q3 verified by a recorded check of 38 private DNGs; EOS R5 Mark II decoded and verified: CRX QP-map escape, odd-height planes) · **Target:** Adobe Lightroom Classic 15.5 / Lightroom 9.6 (Camera Raw 18.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (Nikon Z 6II / Z 8 / Z f in-file distortion correction; Leica Q3 verified by a recorded check of 38 private DNGs; EOS R5 Mark II decoded and verified: CRX QP-map escape, odd-height planes) · **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
 model. The numbers feed [target-app-parity.md](target-app-parity.md); individual shortfalls are
 ranked in [gaps.md](gaps.md). Details per format: [cr3.md](cr3.md),
-[raf-compression.md](raf-compression.md), [sony-lens-corrections.md](sony-lens-corrections.md),
+[raf-compression.md](raf-compression.md), [sony-lens-corrections.md](sony-lens-corrections.md), [nikon-lens-corrections.md](nikon-lens-corrections.md),
 [camera-preview-colour.md](camera-preview-colour.md), [denoise.md](denoise.md).
 
 ## Headline
@@ -219,7 +219,7 @@ essentials user (the default look is what they keep).
 | Item | Adobe | LightCraft |
 |---|---|---|
 | Profile database | 3,635 profile files, 56 makers, auto-selected | **0** (Adobe LCPs never used; no database of our own) |
-| In-file corrections | ✅ | DNG opcodes (WarpRectilinear, FixVignetteRadial, GainMap…) applied; Panasonic / Leica RW2 distortion (79 photos, 13 bodies, 11 lenses); Sony tag 0x7037 distortion for the ILCE-7RM4A (2 lenses) |
+| In-file corrections | ✅ | DNG opcodes (WarpRectilinear, FixVignetteRadial, GainMap…) applied; Panasonic / Leica RW2 distortion (79 photos, 13 bodies, 11 lenses); Sony tag 0x7037 distortion for the ILCE-7RM4A (2 lenses); Nikon NikonNEFInfo distortion (tag `0xc7d5`, about the sensor-shifted optical centre) for the Z 6II, Z 8 and Z f: F-mount lenses on the FTZ within 0.2 px of the camera JPEG, Z lenses within 0.5–1.5 px except the 24-70's wide end (7 px median; `docs/nikon-lens-corrections.md`) |
 | Vignetting / lateral CA from maker notes | ✅ | ⬜ |
 | Manual distortion, vignetting, CA, defringe | ✅ | ✅ |
 
@@ -280,6 +280,7 @@ Beyond decoding:
 | 2026-10-12 | minor | Hasselblad Lunar verified (a Sony NEX-7 ARW under Make HASSELBLAD, now decoded): 236 verified, 232 preview; an uncompressed Leaf MOS is recognised as a raw (preview only) instead of opening as a greyscale image of its mosaic (#1275) |
 | 2026-10-10 | minor | Compressed ORF: pointer to the two Olympus patents that describe the method, as a clean-room starting point |
 | 2026-10-12 | minor | PEF without area tags: masked border rows and columns trimmed against the BlackPoint (issue #1271; KP, KF, K-3 Mark III, K-70, K-1, K-1 Mark II, K-S1, K-S2, 645Z); counts unchanged |
+| 2026-10-13 | minor | Lens profiles: Nikon in-file distortion (NikonNEFInfo `0xc7d5`) for the Z 6II, Z 8 and Z f, validated on 83 frames from three lenses and the CC0 Z f sample (`docs/nikon-lens-corrections.md`); lens score unchanged |
 | 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% |
 | 2026-10-10 (later) | major | Model-by-model measurement against Adobe's published list (1,446 models: 234 verified, 943 unverified, 233 preview, 36 unsupported); `docs/raw/` data and re-measure script; use-weighted share 84% (40% on verified bodies); variant matrix; colour and lens sections with scores; ranked next cameras; RAW readiness ~56% from written parts |
 | 2026-10-10 | major | Created: formats, makers, demosaic, colour and lens checklists; target counts from the installed Lightroom 9.6 bundle listing |

docs/whats-new.md

@@ -2,6 +2,12 @@
 
 ## 2026-10-13
 
+### Nikon lens corrections
+- Raws from the Nikon Z 6II, Z 8 and Z f now open with the camera's own distortion correction, as Lightroom applies a
+  built-in profile: straight lines near the edges stay straight and the framing matches the camera's JPEG. It works
+  with Z lenses and with F-mount lenses on the FTZ adapter, follows the in-body stabilisation's shift of the optical
+  centre, and can be turned off under Lens Corrections. Vignetting correction from the file comes later.
+
 ### Slider drags on large raws
 - Dragging a slider no longer re-renders the edited photo's filmstrip thumbnail on every frame; it follows once you
   let go. On a 64 MP raw the first of those renders decoded the whole file again, which held up the loupe's