Watkins actinometer
Watkins actinometer, watch-form. Sensitive paper under blue glass and mask with standard tint. Fixed calculator engraved on back plate.
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/518
- type:
- actinometer
- credit:
- The Kodak Collection at the National Media Museum, Bradford
