gfletcher Posted February 22, 2016 Share Posted February 22, 2016 Hi guys has anyone ever made and used a Duncan Mask for collimating their SCT ? i would be very interested as to the ease and effectiveness of this method. cheers Graham Link to comment Share on other sites More sharing options...
+Graham Posted February 22, 2016 Share Posted February 22, 2016 New one on me Graham but I am going to give it a go. Normally just use a star to test. Link to comment Share on other sites More sharing options...
Perkil8r Posted February 22, 2016 Share Posted February 22, 2016 Never seen this before, I may have to make one for the 16" Link to comment Share on other sites More sharing options...
Smithysteve Posted February 23, 2016 Share Posted February 23, 2016 Nope, never heard of it, but I will give it a go ?, it looks a good method. .. This is a link to a simple explanation and diagram... http://www.astrovox.gr/forum/download.php?id=17658&sid Cheers Graham! ? Link to comment Share on other sites More sharing options...
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