N°426797 · Family detail
PentaxZoom·PENTAX K mount·1979
Smc Pentax-M 40-80mm F/2.8-4
Specifications01
MountPENTAX K
Focal length40-80mm
Max aperturef/2.8
TypeZoom
Release year1979
Weight395 g
Filter size49 mm
Min focus distance1.2 m
Aperture blades7
Optical elements7
Groups7
Min aperturef/4
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
Lens hoodRH-R49 - Screw-type round
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeStandard zoom lens
Field Notes02
Pentax K-mount zoom lens with a 40-80mm range and max apertures from f/2.8 to f/4, intended for general-purpose to portrait use. Uses a variable maximum aperture across the zoom range.
AI-assisted summary — verify against linked sources
Other Mounts03
No alternate mounts are indexed for this family yet.