N°8673393 · Family detail
MirWide·M42 mount·1973
Mir-20M 20mm F/3.5 [MC]
Specifications01
MountM42
Focal length20mm
Max aperturef/3.5
TypeWide · Prime
Release year1973
Weight470 g
Min focus distance0.18 m
Aperture blades6
Optical elements9
Groups8
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
Lens hoodBuilt-in petal-shaped
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeUltra-wide angle prime lens
Summary02
M42-mount 20mm f/3.5 manual-focus wide-angle lens for general landscape and architecture use. Designed for full-frame/35mm cameras and not optimized for close focusing.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The M42 screw mount has a flange distance of 45.46 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Many M42 lenses close the aperture only when a pin at the rear is pressed. Use an adapter that presses the pin, or set the A/M switch to M.
- Sony EAdapter · 27.46 mm
- Canon RFAdapter · 25.46 mm
- Nikon ZAdapter · 29.46 mm
- Fujifilm XAdapter · 27.76 mm
- L-MountAdapter · 25.46 mm
- Micro Four ThirdsAdapter · 26.21 mm
- Fujifilm G (GFX)Adapter · 18.76 mm
Covers full-frame: it can vignette on a medium format sensor.
- Canon EF-MAdapter · 27.46 mm
- Canon EFAdapter · 1.46 mm
A rear element that sticks out can hit the camera mirror.
No plain adapter reaches infinity focus on: Nikon F.
![Mir-20M 20mm F/3.5 [MC]](https://img.lens-database.com/lenses/variants/v1/b29987d4371040e79bc90bc498272dfe3aedf835230da8218f8dccf2498a2fad/65d6d7ca1cda840ab20a52b4cafe777883af7dc7dde94e209430c2cc4679ea6d/1600x1200/1280.webp)
Other Mounts03
No alternate mounts are indexed for this family yet.