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Old 08-10-2018, 02:01 PM
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multiweb (Marc)
ze frogginator

multiweb is offline
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 19,160
Originally Posted by astronobob View Post
Yes, thnx Marc, your right, the 2ndary has been originally mounted with the required 'offset' so, need to re center the spiders hub to center of tube, then adjust forward/back from main mirror to place squarely in the focus tube line-of-sight..
Cheers for your support
Cool - so that means you need to center your spider vanes, then put an A4 piece of paper inside the tube and move the secondary up and down the tube and orient it until it looks like a circle centered in the focuser draw tube. Try to ignore all the reflections from the primary.
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