Hi guys. Very happy to join the IIS community
I've got a Skywatcher 8 inch f5 and am generally happy with it, now that I've learnt to collimate! But I've noticed something very irritating with its R&P focuser. There seems to be some kind of "grabbing" of the focuser tube the moment i turn the focus wheels one way or the other. It causes the focus tube to jump up or down slightly. Is this what's referred to as image shifting?? It's particularly noticeable when I've got the laser collimator in and I turn the focus wheels backwards or forwards. All of a sudden my well-aligned optics appear to go all over the shop!
Is there a fix for this problem, or do I buy a better focus unit???
Any help would be much appreciated
Matt