oceanheadted Posted May 15, 2009 Share Posted May 15, 2009 Guys,I was musing about imaging with a dob. The problem seems to be that the image gradually rotates with the stars, but your camera doesn't! Has anybody tried creating a motorized t ring widget that rotates the camera once every 24 hours to synchronize with the stars' rotation?Would it work?CheersAlan Link to comment Share on other sites More sharing options...
Doc Posted May 15, 2009 Share Posted May 15, 2009 It's called field rotation and it occurs in all Alt/Az telescopes. You will also need to drive your dob as well, so it tracks the stars at the correct rate.This can be done by either driving your dob via a powered ground board or an equitorial mount.AP with a dob is not impossible but it's hard compared to a GEM. Link to comment Share on other sites More sharing options...
GazOC Posted May 15, 2009 Share Posted May 15, 2009 If you have a big Dob a tracking platform is the usual way around the problem. Link to comment Share on other sites More sharing options...
johninderby Posted May 15, 2009 Share Posted May 15, 2009 There are field de-rotators that can be used with the camera, just be sure you're sitting down when you see the price. John Link to comment Share on other sites More sharing options...
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