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I had a NG 127 - and the focuser was not up to AP useage - I replaced it with a moonlite. With the mono CCD I was using I found had to change focus for the BLUE filter for best results - with a colour DSLR you will not be a able to do this. So if you adjust for "sharpest" focus you will get blue halos - a tweak to defocus (inwards iirc) slightly will get all the colours together. This results is a very slightly softer image - but looks much better. That is the only issue I had beside the focuser and may be the reason some report bloat.
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