[gregbradley]

Originally Posted by DJT

Hi Greg

Nice set but you have some horizontal banding artifacts going on here on both images. Difficult to see on the large and original but when you look at the thumbnails on your Pbase page its quite marked.

I think PI has a canon banding removal script/process if you want to have a fiddle

I noticed a stripe on an earlier image. I am not sure its an artifact though as this camera does not have a banding issue. I have never seen it do it regularly. Its possible but I think its more likely some either airglow or bushfire smoke in bands or perhaps a bit of thin cloud. Its not really regular or evenly spaced. I'll check the original RAWs again. I know some Canon cameras can have that issue but this is a Sony camera and the sensor is very very artifact free.

I checked the RAWs and there is definitely no banding. The little rivers of red may be air glow. I see it at my dark site a lot. I have done time lapses and you can see it dancing around like rivers in the sky. I think that may've been the weekend when that strong aurora was happening down south. Perhaps more airglow than normal. Its often green but sometimes its reddish.

I checked it out more. The slight banding (which is a bit clearer on the Eta Carina shot but its uneven. not level, varying widths, doesn't go full width of the image) is real not an artifact. I tried PI DBE, PS Carboni remove banding action - no effect. The Canon banding is even, regular and really is pattern noise of some type. This is irregular and uneven and is an air current of red airglow.

By the way what is the PI Canon banding removal process in PI called? I had a look and couldn't see one easily (PI uses big words).

Thanks for your response though. It made me check it out more as I wondered about the earlier image if it had banding.

Originally Posted by Rod771

Really nice, Greg! I really like the LMC shot , very good!

Thanks Rod.

Greg.