Adapter guide
Konica AR lenses on Fuji X
Yes, this works. Konica AR has a 40.5mm flange distance and Fujifilm X-mount has 17.7mm, so a 22.8mm mechanical adapter with no glass fills the gap and infinity focus is preserved. Focus and aperture stay manual.
- Konica AR flange
- 40.5 mm
- Fuji X flange
- 17.7 mm
- Adapter thickness
- 22.8 mm
- Optical elements
- None required
Setting it up
Set Shoot Without Lens to On and enter the focal length under Mount Adaptor Setting so stabilised bodies and EXIF know the lens. Focus peaking and digital split image work with any adapted lens.
Automatic diaphragm with an AE (later EE) lock position on the aperture ring for shutter-priority bodies. Press the lock button and move the ring off AE to use the aperture manually.
Konica AR lenses and their field of view on Fuji X
Effective focal length changes with sensor size. The lens itself does not change; the smaller sensor simply captures a narrower part of the image circle.
| Lens | Focal length | Aperture | Frames like (APS-C (1.5x)) | Years | Used value |
|---|---|---|---|---|---|
| Konica Hexanon AR 50mm f/1.7 | 50mm | f/1.7 | 75mm | 1965-1980s | $40 to $150 |
| Konica Hexanon AR 57mm f/1.2 | 57mm | f/1.2 | 86mm | 1965-1970s | $500 to $1,600 |
Frequently asked
Do Konica AR lenses work on Fuji X cameras?
Yes. A plain Konica AR to Fuji X adapter works with no optics. Konica AR has a 40.5mm register and Fujifilm X-mount has a 17.7mm register, so the adapter is a 22.8mm tube that puts the lens exactly where a Konica AR body would. Plain adapter ring. The 40.5mm register is the shortest of the classic 35mm SLR mounts, so AR lenses adapt to mirrorless but cannot reach infinity on any DSLR.
Do Konica AR lenses focus to infinity on Fuji X?
Yes. Because the adapter restores the native 40.5mm register, infinity focus is preserved and the full focus scale on the lens stays accurate. Adapters machined slightly short let the lens focus past infinity by a small margin, which is harmless; adapters machined long stop short of infinity, so buy from a maker with tight tolerances.
What focal length does a Konica AR lens become on Fuji X?
On APS-C (1.5x) Fuji X bodies (X-T, X-H, X-Pro, X-E, X-S, and X-M series) a 50mm lens frames like a 75mm lens on full frame; the aperture and depth of field at a given distance do not change.
More on this mount: Konica AR mount reference