Re: [ATM] Figuring a Schmidt Corrector

["Bob May" <bobmay@nethere.com>]

First off, the Schmidt corrector is a large lens that is used to change the
incoming wavefront from a plane to a fancy shape before the light hits the
primary reflector which also needs to be spherical or near that instead of
the typical parabola.
The Nagler Parracor will correct most of the coma that you have in your
scope very nicely as it is built to correct a F4.5 (I do believe) completely
to pinpoint images to the edge.  Using it on your scope will leave some
residual coma in the image but it will be a whole lot better than if you
didn't have the corrector.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net


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