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proud uncle
Carpal Tunnel
Reged: 01/22/07
Posts: 1572
Loc: Central Texas
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Re: Prism Diagonal
08/28/08 04:50 PM
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Great, informative review, Clive.
Early in the review you mention the star diagonal prisms started waning in popularity because they do not work well with fast optical systems. But then you said nothing more about the performance of these diagonals with respect to different focal ratios. What is the fastest focal ratio that prisms can be effectively used with?
Would a star diagonal prism help with CA correction in an achromat, slower optical system?
Thanks.
--------------------
Kenneth
Zhumell 10" Dobsonian (f/4.9)
2" 32mm WA eyepiece
9mm, 12.5mm, and 20mm Plossls
6mm TMB/BO Planetary
2" 2x ED Barlow
Nikon 10x50 binocular (6.5 deg FOV)
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