AF Nikkor 50mm f/1.8D supports ordinary D850 autofocus and FX capture, but it does not qualify for automated focus shift. Camera-dial aperture control requires its ring locked at f/22.
- Connection
- Direct mount
- What was checked
- Viewfinder stills: ordinary AF, manual-focus selector, aperture-ring setup, metering, FX output and focus-shift exclusion.
- Sources checked
The next source check for this pair is overdue. Next source check due .
Autofocus
SupportedOrdinary autofocus is supported; this non-AF-S, non-AF-P lens falls in D850’s 45-cross-sensor group.
- Camera focus-mode selector AF; directly attached D-type CPU lens.
- Cross-sensor count does not predict focus speed or accuracy.
Manual focus
SupportedFor manual focusing, set the D850 focus-mode selector to M and turn the lens focus ring.
- This ordinary AF lens does not receive the AF-S/AF-P exception to the camera-M instruction.
Aperture control
SupportedLock the lens ring at f/22 for camera-dial aperture control over f/1.8–22.
- Use f4 > Aperture setting > Sub-command dial.
- P/S/A/M exposure modes are supported; the alternative f4 Aperture ring configuration is outside this claim.
Exposure metering
Supported3D color matrix III, center-weighted, spot and highlight-weighted metering are available.
- Viewfinder stills with this G/D CPU lens.
- Spot follows the selected focus point; auto-area AF instead uses the center.
- Mode availability is not a metering-accuracy test.
Sensor coverage & crop
SupportedThis FX lens supports the full FX image area; Large stills are 8256 × 5504 pixels.
- Choose Image area > FX (36×24) and Large image size.
- Other image-area and output-size choices remain available.
Focus aids
UnsupportedAutomated focus-shift capture is unavailable with this ordinary AF lens.
- D850 focus shift explicitly requires an AF-S or AF-P lens.
- This says nothing against ordinary autofocus or manually adjusting focus between photographs.
Not covered by the sources
- The product page’s G-type Yes label conflicts with the original D-type CPU manual; the original manual governs lens type.
- Live-view/video behavior, correction profiles and burst limits were not established.
- No hardware tests: focus accuracy, burst consistency, optical quality and stabilization effectiveness were not measured.
- Minimum supporting firmware and firmware-specific changes were not established; null versions do not mean universal support.
Sources and review notes
Firmware in scope: camera not stated, lens not stated, adapter not stated. “Not stated” means the documents do not give a version range. It does not mean every version works.
Researched 2026-09-07 by an AI research agent reading the documents below, then source-checked 2026-09-07. Nobody has tested this pair by hand. How the research works
- AF Nikkor 50mm f/1.8D — Instruction Manual — PDF page 1, English: Minimum aperture lock and Specifications. Decisive D-type CPU identity and f/22 aperture-ring lock. The old manual alone is not D850 body evidence. Accessed 2026-09-07.
- D850 — Compatible Lenses table — One-page PDF 6MB40211-01_P02-01; CPU type G/E/D, AF-S/AF-P row and notes 1, 7, 8. D850-specific AF, exposure and metering support. Family membership must be checked against the exact lens; converters excluded here. Accessed 2026-09-07.
- D850 — Autofocus — Opening instructions and Cross Sensors table, including zoom footnote. Three AF-S f/1.8 primes fall in the 99-cross-sensor group; non-AF-S/non-AF-P and slower AF-P zooms fall in the 45 group. These are viewfinder sensors, not measured tracking scores. Accessed 2026-09-07.
- D850 — Manual Focus — AF Lenses warning; Electronic Rangefinder; AF-P Lenses. Ordinary AF lenses require camera M for manual focusing; AF-S/AF-P exception, electronic rangefinder and AF-P end-of-range indication. Accessed 2026-09-07.
- D850 — Exposure Mode — P/S/A/M descriptions; Lens Types; A and M sections. Camera aperture control with CPU lenses and minimum-aperture lock for aperture-ring lenses. No exposure-accuracy or video claim. Accessed 2026-09-07.
- D850 — f4: Customize Command Dials — Aperture setting. Aperture-ring control is an alternative setting for ring-equipped lenses; G/E remain controlled by command dial. The shared rule uses the Sub-command dial setting. Accessed 2026-09-07.
- D850 — Metering — Matrix, Spot and Highlight-weighted descriptions. G/E/D distance-aware matrix metering; spot centers on the active point except auto-area AF uses the center. Describes options, not metering accuracy. Accessed 2026-09-07.
- AF Nikkor 50mm f/1.8D — Nikon USA specifications — Product heading; Format; Mount Type; Compatible Formats. FX format and F mount only. The page incorrectly labels G-type Yes; original lens manual is used for D-type identity instead. Accessed 2026-09-07.
- D850 — Image Area — Image Area Options; Automatic Crop Selection; DX Lenses warning. Auto DX crop is selectable, not mandatory. Wider image areas with DX lenses may show obscured edges. Still-image scope only. Accessed 2026-09-07.
- D850 — Image Size — FX and DX Large rows; JPEG/TIFF and NEF size controls. Exact Large pixel dimensions, rather than a crop-factor megapixel estimate. Smaller output choices remain available. Accessed 2026-09-07.
- D850 — Focus Shift Photography — Before Shooting; Focus Shift Photography restrictions; Silent Photography. Requires AF-S or AF-P, camera AF, valid clock and card; exclusions and tripod/VR recommendations. Stacking is performed afterward in third-party software. Accessed 2026-09-07.
Related rules: D850 aperture and metering with these five CPU lenses →