Thread: Are they really the same (ED80)
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Old 04-05-2007, 10:43 PM
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Miaplacidus (Brian)
He used to cut the grass.

Miaplacidus is offline 		 
Join Date: Jul 2005
Location: Hobart
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Won't that vignette the light path, effectively giving you a smaller aperture and higher F-ratio (with dimmer image, sharper stars, and CA-free planets)? (I know this was a problem on the early Stellarvue scopes.)
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