Reprocessed M33 - The Triangulum Galaxy - 1100D

[Gina]

Yet another reprocess of an old data collection...

[Vince1963]

Very nice Gina... Wish i could take pictures like that.... Wish i had a camera lol..

[Gina]

Very nice Gina... Wish i could take pictures like that.... Wish i had a camera lol..

Thank you Yes, a camera does help

[george7378]

That's unbelievable! It's great to see what I could do with an 1100D if I put in the time, effort and equipment

[Welrod50]

What a brilliant capture.

Nice one

[andrewluck]

Not just me then, reprocessing old data . This weather is appalling.

Nice image. What are the exposure details?

Andrew

[Gina]

I think it was 10 lights of 60s at ISO 1600 with darka and flats.

While I was looking I found some later ones of M33 of 300s - I'll feed those through DSS and see what I get

[andrewluck]

I just found a bunch of M33 frames that I've never done anything with as well. Processing them now.

[Gina]

Here is a reprocess on the other set. This is 18 lights of 300s at ISO 1600, 72 darks of 240s (not quite a match), no flats and and no biases stacked in DSS and processed in PS. Cropped and resized - saved as PNG for here.

[andrewluck]

An interesting comparison. There's a lot less noise in the second and if you blink the two images it shows more contrast in the outer spiral arms. It has picked up a lot of red from somewhere though. The brighter stars are showing red halos as well. My feeling is that if you could re-balance it rather more towards the blue and reduce the dynamic range between the core and outer areas there's still more detail to come out of this.

I hope you don't mind the critique.

Andrew

[Gina]

An interesting comparison. There's a lot less noise in the second and if you blink the two images it shows more contrast in the outer spiral arms. It has picked up a lot of red from somewhere though. The brighter stars are showing red halos as well. My feeling is that if you could re-balance it rather more towards the blue and reduce the dynamic range between the core and outer areas there's still more detail to come out of this.

I hope you don't mind the critique.

Andrew

Thank you Andrew No, I'm glad of the critique

[Gina]

Is this better?

[andrewluck]

Much, much better but now slightly green . Have you come across Hasta La Vista Green which does a fine job of removing this sort of colour cast. I haven't got it to hand at the moment but I've run a Remove Green SCNR routine in PixInsight which does the same thing.

Andrew

[Gina]

Thanks - much better Yes I have heard of Hasta La Vista Green But not tried it yet.

Here is green reduction using the green curve in PS :-

[andrewluck]

Excellent.

Could I suggest, a touch less brightness in the core?

[x6gas]

We're obviously living parallel lives reprocessing old M33 data, Gina! This is looking really good though. I prefer your penultimate version - really nice colours...

[Gina]

Thank you both Colour saturation and brightness seems a very personal matter and the range of adjustment is virtually infinite

[andrewluck]

Yes indeed. It makes a huge difference as well how people have their monitors setup. I post a grey scale bar image on my blog from time to time to check that folks can see the full range of brightness.

You should be very pleased with this image Gina. I've put a blink comparison here that shows this image along with your one based upon the 60 second frames. The difference is like night and day!

Andrew

[Gina]

Yes, I am pleased with my image Shows how much difference the sub length and total time make