Photographica Pages
An online guide to collectable cameras and related stuff
21/4.5 Zeiss Biogon for Contax
The 21/4.5 Biogon mounted on a Contax IIa, with the standard 21mm finder No. 435.
Marketed in 1953, this was the widest lens Zeiss ever built for the Contax, and was the first lens for
35mm that had a 90 degree field of view. Some samples are marked as 21/4. It has a rotating collar
around the rear element to protect it, which must be aligned with the red dot when you mount the
lens.
The 21/4.5 Biogon mounted on a Contax IIa, with the standard 21mm finder No. 435.
There are no known variations of this lens
It could also be used with the turret finder No. 440.
The lens, as provided in its bubble.
A look at the rear of the lens, including the rotating protective ring .