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Greg Marshall's Blog – August 2012 Archive (1)

Recommendations for OAG?

I've always used a separate guide scope and like the simplicity that it offers, but I now have pretty clear evidence of differential flexure despite doing everything imaginable to make a solid connection between the 2 scopes. So I want to try an off-axis guider and am looking for recommendations. I think it should be very adjustable (both rotation and prism position) to be able to find a good guide star. My current setup uses 2" SCT threads to connect the reducer/flattener to the scope. This…

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Added by Greg Marshall on August 21, 2012 at 10:55am — 7 Comments