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Perfect thanks Michael. I did indeed try google but it was not my friend yesterday for some reason 🙂

Anyone know of any suppliers of large diameter (450mm) carbon tubes in Europe? Thanks, Derek

One way to confirm if something in an image is a hot pixel or cosmic ray strike would be to have 2 telescopes and 2 cameras pointing at the same target. Both scopes with synchronized exposures. Say constantly taking 1min exposures each aat the same cadence. If something odd appears in both images in the same ra-dec coordinates then there's a good chance its some transient event rather than noise. If I could just get a second C11 and Atik383 I'd give it a shot 🙂

Wow thats an impressive shot. You must have some pretty good seeing conditions too though. Are you at high altitude?

Sorry about digging up this old thread but its freaking awesome!!! I keep coming back to it as a benchmark for any image of M31.