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Big versus small setup
Greetings!
Suppose you have a big telescope with long focal length and pair it with a big sensor. Then you shrink all the equipment to get a smaller, short focal length telescope with an equally smaller sensor and pixel size. The field of view will be the same in both scopes.
My question is, why do people get the larger setup? There must be an intrinsic increase in quality, no? (Otherwise people wouldn't buy 2500mm scopes and pair them with large sensors). I understand the idea of getting a big telescope and small sensor to look at planetary nebulae etc, but I don't understand the seemingly self defeating notion of the former setup.
This question is bugging me quite a bit.
Any comments would be most appreciated
Clear skies!
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