Heyde's Actino Photometer
Extinction meter for use of ground glass screen. Blue filter in eyepiece. f/4.5-36 aperture range. 80 secs to 1/200 sec time range. Pressed metal circular case containing white metal meter. Cardboard and metal liner in case.
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/3153
- Materials:
- white metal (unknown), paper (fibre product) and cardboard
- Measurements:
-
case: 27 mm, 65 mm,
photometer: 16 mm, 60 mm,
- type:
- extinction meter
- credit:
- The Kodak Collection at the National Media Museum, Bradford
