[Tom30887 (Tom)]

Question for the forum, should the following two image trains yield similar results? I’ve just moved from A to B in the hope that a shorter focal length and faster f ratio should be more forgiving under poor seeing.

Both trying to follow the rule that F-ratio should be 5X the pixel size for standard seeing.

A. C11 XLT with a Baader 1.3X Barlow and ASI664 (2.4um pixel) giving 3600mm focal length at F13

B. C11 XLT at native focal length with ASI676 (2um pixel) making 2800mm focal at F10

Is my logic flawed or am I on the right track?