Re: AP 0.75x Focal Reducer adapter for Celestron C14 Visual Back

Roland Christen

In a message dated 11/18/2008 7:52:07 PM Central Standard Time,
uwpf23@... writes:

That's a good point, Roland, and one I had totally forgotten about.
The Celestron focal reducer is matched to their SCT's to cancel
out the coma that is inherent in their design. Your 0.75x f.r. is
more for flat-fields and does not add or subtract any coma, correct?

Yes, ours does not change the coma. How well does the Celestron one work?


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