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Just a question about the scope that you are using, (after googleing the Plane Wave CDK 508mm), orion fits in the field nicely in your pic whereas in my "little" 250mm I can barley fit it in, that must be a really fast scope, so I'm with Raymo I would be expecting a big blast of photons with that sized mirror on that object? Just a bit puzzled.
Cheers Rick
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