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I'll play the odd one out, I don't use my camera lenses in conjunction with a scope, why add more weight. If I am shooting wide-field stuff I use Pentax 6x7 lenses, and either a 200mm f4 or a 55mm/f4. Both mount directly on the CCD, with or without a filter (normally Ha shots).
So, the CCD/lens combo sits on the rail, along with my finder/guider, and nothing else. The composite picture shows it, but since shooting this I have refined the finder/guider mounting, and it is neater/cleaner/better.
Gary
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