Johnson Exposure Tester
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Two hinged metal plates, the upper with a square aperture 19 x 19mm. The one silvered below. The pin in the top plate enters a hole in the bottom plate when closed. To take a 4cm square test paper, enabling four exposures, to be produced in quick succession. Provisional patent. 5093/45. Johnson's of Hendon Ltd. 1945.
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/1539
- Materials:
- metal
- Measurements:
-
overall: 97 mm x 72 mm x 2 mm,
- type:
- exposure meter
- credit:
- The Kodak Collection at the National Media Museum, Bradford
