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Thanks Rick and jjj,
I was purely looking at the aperture advantage but I will most definitely take your advice and stick to the original plan of an ED80.
jjj, I didn't even know that the process of taking subs on different nights was possible? or even practical?
Can you also elaborate on the reason why a longer focal length would make it more challenging? Sorry but I'm still trying to grasp even the pros and cons of short vs. long focal lengths in scopes. Obviously in the examples Andrew has just provided, the RC-8 is obviously a smaller FOV. Is that the main factor?
Russ
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