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Thanks Aiden and Raymo, Yes the transition from galaxy interface to the background is very grainy. I used dither when guiding to lower noise but it is the edges that need more data.
Thanks Dunk, it had more detail than the effort I made last year mainly because I am much more fussy about selecting and rejecting subs.
Dithering with my setup really adds to the time needed to collect subs (seems to add 90 to 120 seconds per sub). I guess I should be using a LP filter and taking much longer subs to reduce the number of dithers.
Bruce.
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