Ica Diaphot extinction calculator

Ica Diaphot extinction calculator, made by Zeiss Ikon A.G. Watchform extinction calculator, rotating continuous wedge, blue tinted, moves behind eyepiece.

Details

Category:
Photographic Technology
Collection:
Kodak Collection
Object Number:
1990-5036/543
type:
extinction calculator
credit:
The Kodak Collection at the National Media Museum, Bradford