[bojan]

Last night I was imaging Jupiter, Saturn, Mars...
Weather conditions here in Melbourne were not great so results were also way below my expectations...

Anyway, while focusing, I noticed the image and colimation was wandering across the cropped FV of Canon 60D (in 640x480 video mode), depending on focuser knob movement and postion (it was best when I was approaching focus point by rotating focus knob in CCV... obviously previous owner had the same issue as I didn't attempt to re-colimate the scope since I've got it. The issue is also widely discussed on the web (CN for example).

I am aware that this is the consequence of (poor) design of C11 focusing mechanism (one arm, off-axis push-pull), and many people are using additional external focuser to minimize the problem.. which will potentially always be there ("mirror flop") unless the primary mirror is properly fixed and supported in optimal position - and that requires redesign of the whole thing that is inside.


If anyone in our community did something about it, I would like to know about any ideas and solutions.