Heyde's Aktinometer. Extinction meter for use on camera ground glass screen

PART OF:
The Kodak Museum Collection
Made:
circa 1914 in London
maker:
Staley & Co.

Heyde's Aktinometer. Extinction meter for use on camera ground glass screen. Manufactured by A. E. Staley and Co, London EC.

Details

Category:
Photographic Technology
Collection:
Kodak Collection
Object Number:
1990-5036/4988
Materials:
metal (unknown), plastic (unidentified) and glass
Measurements:
overall: 35 mm 75 mm,
type:
extinction calculator
credit:
The Kodak Collection at the National Media Museum, Bradford