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Porro prism
(redirected from porro prisms)

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Porro prism [′pȯ·rō ‚priz·əm]
(optics)
One of two identical prisms used in the Porro prism erecting system; it is a right-angle prism with the corners rounded to minimize breakage and simplify assembly.
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Prism Type Z shaped porro prisms are best suited for astronomy binoculars.
Choosing Binoculars for Astronomy by Dave Text / Travel, recreation and leisure community
The best astronomy binoculars come with Bak-4 Porro prisms (Bak-4 glass is high quality glass and porro prisms generally provide greater light transmission and a sharper image than their roof prism counterparts) ?
How to Choose Binoculars for Astronomy by Terry Ross / Reference and Education community
Finally, what you can''t forget are designs like Porro Prisms, Roof Prisms and pocket designs.
Binoculars ? Take A Long View by Graeme Ramsey / Computers and Internet community
 
 
 
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