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Old 23-04-2006, 02:29 PM
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asimov (John)
Planet photographer

asimov is offline
 
Join Date: May 2005
Location: Bundaberg
Posts: 8,819
Hey nice one Matt! You captured it, thats what counts.

BTW I now know exactly what you were saying about the C9.25 focus problem. When you let go of the focus knob it shifts. I never noticed it until last night when I had a visual session. I reckon whats going on is they use thick grease on the baffle tube, & when you let go of the focus knob, the carriage/primary is still slowly sliding into position until it takes up the backlash in the threaded rod attached to the focuser knob. Its a pretty old trick: add thick grease to smoothen the action. The only way I found of controlling it better was to adjust focus very slowly..

Thoughts?
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