N°106000 · Family detail
PentaxWide·M42 mount·1971
Asahi Super-Multi-Coated Takumar 20mm F/4.5
Specifications01
MountM42
Focal length20mm
Max aperturef/4.5
TypeWide · Prime
Release year1971
Weight251 g
Min focus distance0.2 m
Aperture blades5
Optical elements11
Groups10
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
Lens hood58mm - Clamp-on rectangular
TeleconvertersNot available
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeUltra-wide angle prime lens
Field Notes02
Asahi Super-Multi-Coated Takumar 20mm f/4.5 M42-mount prime wide-angle lens for general wide views and landscape use. It has a moderate maximum aperture for daylight shooting.
AI-assisted summary — verify against linked sourcesOther Mounts03
No alternate mounts are indexed for this family yet.