Hurter and Driffield Actinograph 2nd Model
Wooden slide rule type calculator for exposure. Flat wooden plate marked with 3 scales. Speed 0.5-300. Exposure 0.005-60seconds. Lens f/2.8-64. Slide marked with weather: Very dull, dull, mean, bright, very bright. With speed index mark. Card insert carries time of day and year scale for North latitude 7 degrees and 30 foot. Hurter and Driffield. c.1898.
Details
- Category:
- Photographic Technology
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/3860
- Materials:
- wood (unidentified), cardboard and felt
- Measurements:
-
overall: 95 mm x 100 mm x 5 mm,
- type:
- actinometer
- credit:
- The Kodak Collection at the National Media Museum, Bradford
