N°92460 · Family detail
CosinaPortrait·PENTAX K mount·1981
Cosina Cosinon-S 50mm F/1.8
Specifications01
MountPENTAX K
Focal length50mm
Max aperturef/1.8
TypePortrait · Prime
Release year1981
Weight170 g
Filter size49 mm
Min focus distance0.5 m
Aperture blades6
Optical elements6
Groups5
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeStandard prime lens
Field Notes02
Cosina Cosinon-S is a 50mm prime lens for the Pentax K mount, with a maximum aperture of f/1.8 for low-light and shallow depth-of-field use.
AI-assisted summary — verify against linked sourcesOther Mounts03
No alternate mounts are indexed for this family yet.