Re: 8" SCT v. 11" SCT

Haven't done the math, but the vignetting at about 2 degrees in a C5+
with a reducer, although visible, is not visually offputting. I
wouldn't
image through it, though.
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I have a C5. With a F6.3 reducer/corrector, the focal length ends up
at about 800mm and a field of view with a 1.25 inch eyepiece of around
2 degrees, though the hole in the back of the scope is quite a bit
smaller than 27mm so vignetting is going to be a factor.

jon

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