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New Guide Camera and more...
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22-02-2018, 10:20 AM
Camelopardalis
(Dunk)
Drifting from the pole
Join Date: Feb 2013
Location: Brisbane
Posts: 5,429
Chris, check the size of the prism of your OAG. The 174 is a big chip (relatively) and could result in some nasty vignetting if there is too much disparity.
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