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I'm going to test another fr/ff on the GSO RC and the 127mm scope. I believe it will work equally well on both of them. The fr is the Astrophysics ccd67 which has been shown to take the GSO RC from f8 to f4.8 and maintain a flat field over a 22mm diam chip. This fr should also work well with the 127mm scope.
As soon as I get some cloud free skies I'll post the results here.
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