Ricoh XR Rikenon 18mm F/2.8

Specifications01

MountPENTAX K

Focal length18mm

Max aperturef/2.8

TypeWide · Prime

Release year1982

Weight348 g

Filter size67 mm

Min focus distance0.25 m

Optical elements11

Groups9

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

Field Notes02

Ricoh Rikenon 18mm F/2.8 is a Pentax K-mount prime wide-angle lens for general wide views and low-light photography. It has a maximum aperture of f/2.8.

AI-assisted summary — verify against linked sources

Catalog note · source: thelensdb

Sources03

thelensdb.comVisit ↗

lens-db.comVisit ↗

Other Mounts03

No alternate mounts are indexed for this family yet.