K 8.4/2.8 Bird’s-Eye

K 8.4/2.8 Bird’s-Eye

General Description

A circular fish-eye lens.

Product Information
Exact Name smc PENTAX BIRDS-EYE 1:2.8 8.4 mm
Color black
Year of Introduction Photokina 1982

Technical Specifications

Optical Formula 10 elements in 7 groups
Aperture Range f/2.8 ~ f/unknown
Number of Aperture Blades unknown
Minimum Focusing Distance lens has no focusing ring
Maximum Magnification depends on the lens-to-subject distance
Special Features bird’s-eye lens
Front-Filter Thread no
Gelatine-Filter Holder yes
Maximum Diameter unknown
Length unknown
Weight unknown
Special Features manual diaphragm
Cap unknown
Fitting Hood(s) unknown
Fitting Case(s) unknown