Weston Master III exposure meter

Sangamo Weston Limited

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Weston Master III Universal Exposure meter A CdS cell photoelectric exposure meter
The Kodak Collection at the National Media Museum, Bradford
Science Museum Group Collection

Weston Master III exposure meter, 1959. Made by Sangamo-Weston Ltd, Enfield. Model No. s141.3. Photoelectric meter, two scales. Dial type calculator ASA speed .3-5000. Perforated baffle for high light levels (broken). Invercone attachment with filter for high light levels. No. B 7316.

Weston Master III Universal Exposure Meter, made by Sangamo-Weston Limited in London, 1959.

A CdS cell photoelectric exposure meter. Used to determine the correct exposure for a photograph, the Weston Master recorded light value, and indicated exposure value, f/stops, shutter speeds and Weston Ratings - Weston’s own system of film ratings.


Photographic Technology
Object Number:
metal (unknown) and rubber (unidentified)
exposure meter
  • measuring device
  • light measuring device
The Kodak Collection at the National Media Museum, Bradford

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