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An 8" or 10" fast Newt with a coma corrector on an Eq6 is an excellent choice for CCD astro-photography. It is unlikely even a 8" Cass would be satisfcatory on an Eq5. You can use a 2" Barlow for F7 to F9 ratio.
Last edited by Satchmo; 13-05-2009 at 08:23 AM.
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