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Coma Corrector Info For RFT's

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Posted by Jim Barclay/">Jim Barclay on June 20, 1999 03:01:23 UTC


I am planning on putting together a 12.5" F2.92 RFT (primary is a C/Cass mirror)and was wondering what can I do about the coma? would a Celestron CC work? or do I need a special CC to cover a full 45mm dia. circle of illumination which is the diagonal of a 24 x 36mm 35mm frame. Any help guys? Secondary is 3.1".



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