I have an older CGEM mount, recently DIY hypertuned, WHICH SEEMED TO BE TRACKING AND POINTING WELL.
But, recently, I had the opportunity to run 72 subs of 10 seconds length through a 1600mm scope. I am at 28#. Examining the subs 29% were bad!!
An example of a really bad frame is enclosed. Nothing unusual was going on except a guy on a gas-powered segway cruised by at 11pm.
With such short exposures, i would expect nearly 100% good frames. How do I diagnose the problem?
tnx for any comments
attached file is at 100%