Heyde's Aktino-photometer made by W.F. Stanley & Co. Cylindrical extinction meter. Rotating continuous wedge moves under blue-glass eyepiece. High-low filter. (See 536 - larger)
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/535
- Materials:
- metal (unknown) and glass
- type:
- extinction calculator
- credit:
- The Kodak Collection at the National Media Museum, Bradford
