N°8656498 · Family detail
HeliosPortrait·PENTAX K mount
Helios-77K-4 50mm F/1.8 [MC]
Specifications01
MountPENTAX K
Focal length50mm
Max aperturef/1.8
TypePortrait · Prime
Weight250 g
Filter size52 mm
Min focus distance0.45 m
Aperture blades6
Optical elements6
Groups4
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeStandard prime lens
Field Notes02
50mm f/1.8 standard portrait prime for Pentax K-mount, intended for low-light and shallow depth-of-field photography. Helios manual-focus build (MC).
AI-assisted summary — verify against linked sourcesOther Mounts03
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