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M 20/4

General Description

Product Information
Exact Namesmc PENTAX-M 1:4 20mm
Colorblack
Years of Production1977 ~ 1984
Availabilityused, several times a year
Catalog Number22830
Sold with Hood
Sold with Casehard case: SMC PENTAX 4/20

Technical Specifications

Optics
Optical Formula8 elements in 8 groups
Aperture Rangef/4 ~ f/22
Number of Aperture Blades5
Minimum Focusing Distance0.25 m
Maximum Magnification0.12 X
Mechanics
Filter Diameter49 mm
Maximum Diameter63 mm
Length30 mm
Weight150 g
Accessories
Capplastic clip-on cap, 52 mm
Fitting Hood(s)clip-on hood: PH-S49
Fitting Case(s)hard case: SMC PENTAX 4/20