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Old 11-06-2010, 08:55 PM
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mental4astro (Alexander)
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mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,004
From what I know of any of the Schmidt corrector family, they are all matched to their optimal image position. If the plate does need to be removed, and the primary too for this focuser replacement, you will need to very carefully mark the position of the corrector plate and the primary in their current placement BEFORE removing anything. Otherwise the corrector/mirror arrangement won't be at its best.

Focuser wise, there are many good options. What you will need to be mindful of is that what ever focuser you select does have the travel and relative placement of the mechanism to the optical cone path. If too low in profile, you might need an extension tube to achieve focus. If too proud, you might not achieve focus with those EPs needing a lot of in-travel of the draw tube.

Just some things to keep in mind. Others will expand on precautions/requirements, and have focuser suggestions.
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