Quote:
Originally Posted by TareqPhoto
Exactly, so that i was thinking what is a big jump from 7" [180mm] should be? C11 won't be really a big jump, C14 yes, but anything else? any another big jump from 180mm and not C14 only?
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The big jump from a 180mm Mak is the f ratio, f15 down to f10 is a leap astro imaging wise. The C11 has the same focal length but is much faster. Resolution also increases with aperture. Of course the biggest factor for high magnification imaging is the need for good seeing, here in the tropics it's usually pretty ordinary.