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K 20/4

General Description

Product Information
Exact NameSMC PENTAX 1:4/20
Colorblack
Years of Production1975 ~ 1977
Availabilityused, once in several years
Catalog Number22841
Sold with Hood
Sold with Casededicated hard case: exact name unknown

Technical Specifications

Optics
Optical Formula12 elements in 10 groups
Aperture Rangef/4 ~ f/22
Number of Aperture Blades5
Minimum Focusing Distance0.25 m
Maximum Magnification0.12 X
Mechanics
Filter Diameter58 mm
Maximum Diameter63 mm
Length57 mm
Weight300 g
Accessories
Capplastic clip-on cap, 58 mm
Fitting Hood(s)clip-on hood: PH-S58
Fitting Case(s)dedicated hard case: exact name unknown