[codemonkey (Lee)]

Originally Posted by cometcatcher

Nice pair of galaxies Lee. I want em now.

Thanks Kevin; go for it mate, keen to see what you can get out of 'em :-)

Originally Posted by clive milne

That is very, very good Lee!

Thanks very much Clive :-)

Originally Posted by billdan

Looks very pretty Lee, nice colour and detail in the galaxies.

I'm not trying to be picky but the stars near the bottom of the frame have diffraction spikes, any idea why?

Cheers
Bill

Thanks Bill! Good question. As you note, it's only on the stars towards one side of the frame, even though there's equally large stars on the other without the effect. I'm not sure what it is yet. The ASI 1600 does have some weird diffraction patterns on bright stars, but they look different to this and would (you would expect) appear across the entire frame.

I recently cleaned the Esprit's objective, and I'm wondering whether some residue has been left behind that might have caused it? Then again, I went and looked back and found the same thing on my earlier image of NGC 1808 and friends, and I'm pretty sure I cleaned it after taking that...

So no, to answer your question, I'm not sure what it is but I'm speculating that it's something on my objective or something on my filters.

Originally Posted by Camelopardalis

That's a beauty Lee, well done

Thanks very much Dunk! :-)