Term - Porro prism
|Porro prism||SWPP and BPPA Photographic Glossary|
Friday 18th April 2014
The conventional shape binoculars where light is bounced through 90 using a series of prisms. The other common type, used by many of the slim pocket style models, is roof prism that allows a straight tubed body.
Information provided by: SWPP BPPA
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