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Focuser

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Anyone who has tried their hand a CCD imaging will testify that focusing can be a pain. The camera I am using is a MX5 from starlight xpress. Moving to Astro Art software has been good as amongst other reasons the focus window in AA can update much more quickly. However moving between screen and focuser to make changes would have been a hassle. What I have done is add a small stepper to a standard 2" rack and pinion focuser. The stepper is controlled from another PC via a Darlington array. Focus can be adjusted by a couple of extra switches on the handpad or directly from the PC. The pc also keeps a record of focus movement in 1/1000ths of an inch. Together this makes focusing pretty painless and flexible

 

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Copyright 2006 Steve Chambers. All Rights  Steve@pmdo.com

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