Ricoh Auto Rikenon 21mm F/3.8

Specifications01

MountM42

Focal length21mm

Max aperturef/3.8

TypeWide · Prime

Weight290 g

Filter size72 mm

Min focus distance0.3 m

Aperture blades6

Optical elements9

Groups8

AutofocusNo

StabilizationNo

TeleconvertersNot available

EraFilm era

Production statusDiscontinued

Additional Info02

Lens TypeUltra-wide angle prime lens

Field Notes02

Ricoh Auto Rikenon 21mm f/3.8 wide-angle prime lens for M42 screw-mount cameras, suited for landscapes and general wide views. Typical aperture for moderate depth of field.

AI-assisted summary — verify against linked sources

Catalog note · source: thelensdb

Sources03

thelensdb.comVisit ↗

Other Mounts03

No alternate mounts are indexed for this family yet.