Quote:
Originally Posted by Octane
Frank,
I've tried the combination, and, whilst the resolution is mind-blowing, with the standard ED127 focuser, there is a horrible amount of vignetting, that even critical flats can't really fix.
What you'll end up with is the almost the same field that a 1.6x crop sensor will give you, really.
H
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Hi Hamuyan,
mind if I butt in? The Ed127 Alex used is mine so I claim some connection to this thread. I am planning to put a modd'd 20D on this scope and seeing your response to Frank about his 5D wondered why it might be that the focuser would cause vignetting? This ED127 is fitted with what Gilman called (als sold as) their upgraded focuser for astroimaging. Make any difference to the vignetting?
Peter