Exposure Meter Ilford exposure calculator. Exposure calculator of five concentric discs with scales for exposure times 2 hours to 1/16 sec., apertures f4-64; subject/lighting; date number (from table on reverse) plate type. Made by The Britannia Works Co. Ltd.; Scott's patent 17642
- Photographic Technology
- Object Number:
- exposure calculator
- tools and equipment
- equipment by process
- image making equipment
- photographic processing equipment
- The Kodak Collection at the National Media Museum, Bradford
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