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Originally Posted by PhotonCollector
Geeday mate,
As far as overcorrection is concerned: I would say you have nothing to worry about. The fact that your 'scope has a corrector plate is not an issue, your 'scope has coma and the MPCC corrects that - it wouldn't matter if your 'scope had a triplet-overhead-single-bypass lens or whatever - you 'scope produces coma at the film plane and the MPCC corrects the coma.
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That's what I think too, but these guys on the LXD group want to see the proof, so hopefully I can give it to them soon.
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In fact another IIS member (tornado33) is using he's MPCC with a f/3.6 Schmidt-Newtonian and he's over the moon, since it always produced a fair bit of coma and now it's all but gone!
Baader say that the MPCC is designed for f/4 to f/6 telescopes and works best when the MPCC is placed 55mm from ccd plane. It turns out mine is 54mm, so I might fittle to add 1 mm.
What f/ratio is your 'scope ?
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OK, my SN10 is f4. Meade says that the corrector plate gives the scope the coma of an f6. So the MPCC should do the job very nicely.
Cheers