'Porro' optical system, from a trench periscope
- Made:
- 1910-1920 in United Kingdom
- maker:
- R and J Beck
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Science Museum Group
© The Board of Trustees of the Science Museum
'Porro' optical system with modified 'Porro' type cemented glass prisms, from No.14 trench periscope, by R & J Beck Limied, London, England, 1910-1920.
Details
- Category:
- Optics
- Object Number:
- 1955-323
- Materials:
- glass
- Measurements:
-
overall: 40 mm x 50 mm x 25 mm, Wt. 0.06kg
- type:
- porro–abbe prism and component - object
- credit:
- Banfield, Arthur Clive
