Quote:
Originally Posted by mental4astro
Interesting you should say this. As I said, i have gone out of my way to look for vignetting, observing under as many conditions as possible to make sure I wasn't missing anything. I have never seen it in these scopes. .
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You seem to misunderstand.
Vignetting is the stopping down of the FOV by the field stop in the eyepiece and size of the focuser.
The size of the 100% illuminated field and the light loss drop off towards the edge of the FOV is different, and depends on the size of the diagonal and the shape of the light cone.