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Thanks guys, a couple of good ideas there. Ill try finding one of those very small scopes i think, but failing that i like the idea of the pentax screw mount lens. I just finished modifying a 500mm cannon mirror lens to take 1 1/4 eyepiece. the job was insanily difficult as i had to dissassemble the lense and machine the mounting area. dont want to do that again in a hurry. The finderscope i tried was a 50mm from my skywatcher newt but even with the ccd almost touching the glass it wasn't close enough ?. if i understood optics a bit better i guess i could change the length of the scope.
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