N°427821 · Family detail
RicohPrime·M42 mount
Ricoh Auto Rikenon 55mm F/2.8
Specifications01
MountM42
Focal length55mm
Max aperturef/2.8
TypePrime
Min focus distance0.9 m
Aperture blades5
Optical elements4
Groups3
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
TeleconvertersNot available
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeStandard prime lens
Field Notes02
Ricoh Auto Rikenon 55mm f/2.8 prime lens for M42 screw-mount cameras. A normal/short-tele option for general photography, including portraits.
AI-assisted summary — verify against linked sourcesOther Mounts03
No alternate mounts are indexed for this family yet.