Brass Mounted Concentric Lens
- Made:
- c.1890
- maker:
- Ross and Company
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Science Museum Group
©The Board of Trustees of the Science Museum
Brass mounted concentric lens, consisting of two achromatic doublets of the new barium crown glass of high reflective index and a new flint glass of low index. Because of spherical aberation the maximum aperture at which it could be used was F.16 . The introdyction of the larger aperture Zeiss Protars prevented the lens from achieving any great success.
Details
- Category:
- Photographic Technology
- Collection:
- Arthur Frank Collection
- Object Number:
- 1979-559/1107
- Measurements:
-
overall: 40 mm 60 mm,
- type:
- lens
- credit:
- The Arthur Frank Collection
