Carl Zeiss patent combination lens
- Made:
- circa 1910 in London
Carl Zeiss patent combination lens with a ring type iris diaphragm. When used as a doublet the effective aperture is F.4.5 with 7 inch f.l. When the front element is used alone the effective aperture is F.12.5 witha focal length of 11.5 inches. Ross c.1910.
Details
- Category:
- Photographic Technology
- Collection:
- Arthur Frank Collection
- Object Number:
- 1979-559/1504
- Materials:
- glass
- Measurements:
-
overall: 40 mm 47 mm,
- type:
- compound lens
- credit:
- The Arthur Frank Collection
