'Porro' type optical system taken from field glass binoculars
- maker:
- Barr and Stroud Limited
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'Porro' type optical system with modified cemented 'Porro' glass prisms and cemented magnifying eye-piece field-lens, taken from (7 x 50) field glass binoculars by Barr and Stroud Limited, Glasgow, Scotland, 1930-1950.
Details
- Category:
- Optics
- Object Number:
- 1955-322
- Materials:
- glass, Canada balsam and stainless steel
- Measurements:
-
overall: 50 mm x 50 mm x 30 mm, .03kg
- type:
- porro–abbe prism and component - object
- credit:
- Banfield, Arthur Clive
