N°434534 · Family detail
RicohTelephoto·M42 mount
Ricoh Auto Rikenon 300mm F/5.5
Specifications01
MountM42
Focal length300mm
Max aperturef/5.5
TypeTelephoto · Prime
Weight850 g
Filter size62 mm
Min focus distance6 m
Aperture blades8
Optical elements5
Groups3
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
TeleconvertersNot available
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeSuper telephoto prime lens
Summary02
Ricoh Auto Rikenon 300mm F/5.5 is an M42-mount telephoto prime lens intended for distant subjects. It has a maximum aperture of f/5.5.
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.
Other Mounts03
No alternate mounts are indexed for this family yet.