Watkins actinometer. Watch-form actinometer
Watkins actinometer. Watch-form actinometer, blue glass over mask with standard tint. Fixed calculator engraved on back plate.
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/517
- Materials:
- metal (unknown) and glass
- Measurements:
-
overall: 65 mm x 5 mm, 40 mm,
- type:
- actinometer
- credit:
- The Kodak Collection at the National Media Museum, Bradford
