Heyde's Aktino-photometer
Disc-cylindrical extinction meter (see 535 - smaller) rotating continuous wedge behind blue glass in eyepieces. 1 scale.
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/536
- Materials:
- glass
- type:
- extinction calculator
- credit:
- The Kodak Collection at the National Media Museum, Bradford