Revolving Diaphragm
- Made:
- 1844
Revolving diaphragm by E. Palmer, c. 1844.
Details
- Category:
- Photographic Technology
- Object Number:
- 1920-612
- Measurements:
-
overall: 115 mm x 10 mm x 25 mm, .5 kg
- type:
- diaphragm - optical
- credit:
- Thomas, F.W.
