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Old 02-01-2019, 03:05 PM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Sydney
Posts: 22,060
Quote:
Originally Posted by Stefan Buda View Post
Where the eyepiece is in the last picture. Almost too much back focal length without a classic focuser. If I fail at getting the secondary focuser working well, then I can always fall back onto using some sort of Crayford type. I would hate to do that, because of all the potential alignment problems. Just because a Crayford type focuser works well, it does not mean that it has no co-axiality/co-linearity and orthogonality problems. Those are difficult errors to deal with in a Crayford..
Ha yeah I had figured that one out. I was wondering when. Can't wait to see the fov and image scale on this thing.
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