Disc calculator in ebonite with 5 scales : 1/16 sec - 2 hours, light condiitions, aperture f/4-64, date table no. and plate type. The Britannia Works Co Ltd.

Details

Category:
Photographic Technology
Collection:
Kodak Collection
Object Number:
1990-5036/3868
Materials:
ebonite
type:
exposure meter
credit:
The Kodak Collection at the National Media Museum, Bradford