Deer Lick Group and Stephan's Quintet

[emyliano2000]

This is why I never throw away data that, at the time, I think it's good for nothing. I revisited my Deer Lick and Stephan's quintet to see how much better my processing skills are after one and a half years.

Here's tonight's attempt

And my previous attempt:

It wasn't very easy to get to this result but I'm really glad I managed to do it properly this time. 

Here's how the pixinsight autostretch looks like. The 450d banding is absolutely terrible. 

 

Full resolution and other details on my astrobin account:
https://www.astrobin.com/ncv0wn/0/

Emil

 

Edited February 9, 2020 by emyliano2000

[emyliano2000]

And here's the annotated version.

[Brian Maurer]

Amazing improvement!

[tomato]

Yes, I certainly prefer your second process, better colour balance, on my screen ver 1 has a very slight green cast to the background.

Great work👍

[carastro]

Very nice image.  I used to own a 450D and had problems with banding.  I was then given a tip off that if downloading to a laptop, not to have the SD card in the camera at the same time.  I removed it and the problem certainly got a lot better.

Not sure if this is your situation, but if it is give it a try.

Carole 

[emyliano2000]

27 minutes ago, carastro said:

Very nice image.  I used to own a 450D and had problems with banding.  I was then given a tip off that if downloading to a laptop, not to have the SD card in the camera at the same time.  I removed it and the problem certainly got a lot better.

Not sure if this is your situation, but if it is give it a try.

Carole 

Thank you!

Unfortunately I don't have the 450D or any of the telescopes used to shoot that target but as far as I remember, I never kept the SD card in the camera. A friend told me that using the camera at ISO1600 would show a very good improvement but not having the camera anymore, I can't test it. 

The canon banding removal script in pixinsight combined with the background flattening tools in fitswork did a pretty good job. 

Emil

[Tom OD]

Great result

Tom

[ollypenrice]

Lovely job and what an improvement! Before doing anything else it is vital to get the background sky right.

Lots of colour in the galaxies, too. Very classy.

Olly

[kirkster501]

Brilliant, I really like it.  I like the colours and how you have kept some colour in the background sky.  Many, myself included, can have a tendncy to obliterate the sky to make it black and reduce noise.  It's a delicate balanciong act -  but  you haven't done that here due to the quality of your data set and the delicate processing.

Good job!

[MartinB]

Excellent, well worth the redo.