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I'm not sure guys, I think f ratio determines everything, once focal length is the same, as it is after using a focal reducer. (Talking astrophotography only, with same camera).
Reducer reduces f ratio, and therefore focal length, and also image circle.
So pretty sure in my example, both scopes would produce exactly the same image (more or less).
Just wondering if a larger aperture scope once reduced gives more contrast etc. Any benefit other than being more versatile (if you ever do use it without a reducer).
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