Hey Paul, I'm like you. Wondering where the hell in the imaging train things go wrong. And I always though it had to be with the mirror alignments, etc... but as it turns out these things are pretty easy to fix and most of the problems looking back at it happen way closer to home. The focusers and particularly the way things are attached to the back of the imaging train. I'm seriously rethinking that part as I always assumed focuser were squared and aligned. Last night was a revelation. After nailing all the assembly spot on and checking through the focuser once mounted I thought wtf? What was the point?
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Originally Posted by Paul Haese
Marc,
I am not using the standard focusor though. I bought a feather touch and had everything sorted when I was imaging with the 40D. The extension setup was quite different to how I have it at present with the QSI. Certainly check for optical alignment is a must and I will be putting a catseye collimation cheshire over the back of the scope to see if everything is concentric. You raise an interest idea though that everything can be a little out and create a large problem. The compression ring on the feather touch is not likely to be out, but still worth checking though.
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