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K 8.4/2.8 Bird's-Eye

General Description

A circular fish-eye lens.

Product Information
Exact Namesmc PENTAX BIRDS-EYE 1:2.8 8.4 mm
Colorblack
Years of ProductionPhotokina 1982

Technical Specifications

Optics
Optical Formula10 elements in 7 groups
Aperture Rangef/2.8 ~ f/unknown
Number of Aperture Bladesunknown
Minimum Focusing Distancelens has no focusing ring
Maximum Magnificationdepends on the lens-to-subject distance
Special Featuresbird's-eye lens
Mechanics
Front-Filter Threadno
Gelatine-Filter Holderyes
Maximum Diameterunknown
Lengthunknown
Weightunknown
Special Featuresmanual diaphragm
Accessories
Capunknown
Fitting Hood(s)unknown
Fitting Case(s)unknown