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Old 01-08-2020, 08:29 AM
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M83 over 31 hours

This is a combo of M83 data from a CDK17 (1 hour of luminance Microline16 camera) and about 18 hours of luminance from ASI183mm and AP Honders F3.8.

So its mostly the RHA here.

I am happy that this little 183mm works on the Honders as the small pixels could have meant it doesn't work well with it. I'll have to experiment more with 2x2 binning as I don't think I would lose hardly any resolution but would gain a bit in signal to noise ratio.

M83 HaLRGB. 60 1180 150 250 240 minutes a total of 31 hours and 10mins

The data actually showed the extended halo and the arm that branches off the main spiral but at a cost of spoiling the rest of the image so I didn't try to get that in the final image.

https://pbase.com/gregbradley/image/170866340/large regular size

https://pbase.com/gregbradley/image/170866340/original large size

Greg.
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  #2  
Old 01-08-2020, 10:51 AM
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Very nicely done Greg!
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Old 01-08-2020, 11:55 AM
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A fine M83 to be sure. Colours are good without going over the top. A collection of background fuzzies to boot
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Old 01-08-2020, 03:31 PM
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marc4darkskies (Marcus)
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Lovely Greg! Great colours - not overdone.

Perhaps a bit too much noise reduction The detail looks a tad soft to me - especially near the core.

A great image regardless though Greg! Nicely done!
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Old 01-08-2020, 04:19 PM
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I agree with everything Marcus said

Well done

Mike
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Old 01-08-2020, 04:24 PM
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That's a lovely M83, Greg, congrats!
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Old 01-08-2020, 04:25 PM
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Quote:
Originally Posted by Andy01 View Post
Very nicely done Greg!
Thanks Andy. I was wanting to see how well this ASI183mm could do galaxies and it does pretty well. But its the CDK data that adds the fine detail.

Quote:
Originally Posted by Ryderscope View Post
A fine M83 to be sure. Colours are good without going over the top. A collection of background fuzzies to boot
Thanks Rodney. I did have several versions and I did prefer this amount of colour. Its often a challenge how much colour to "give" these objects.

Quote:
Originally Posted by marc4darkskies View Post
Lovely Greg! Great colours - not overdone.

Perhaps a bit too much noise reduction The detail looks a tad soft to me - especially near the core.

A great image regardless though Greg! Nicely done!
Thanks Marcus. Good tip. I just did a quick repro, same link and sharpened it up quite a bit without highlighting noise. I think this is as sharp as I can get it. The CDK data, as you would expect, has more fine detail in it than the RHA 305.

Greg.
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Old 01-08-2020, 05:30 PM
Placidus (Mike and Trish)
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Superb work Greg! You've done a most particularly fine job on the tiny dust details across the very centre of the nucleus.
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Old 01-08-2020, 07:06 PM
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marc4darkskies (Marcus)
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Quote:
Originally Posted by gregbradley View Post
...
Thanks Marcus. Good tip. I just did a quick repro, same link and sharpened it up quite a bit without highlighting noise. I think this is as sharp as I can get it. ....
Now you're talking!
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Old 01-08-2020, 07:18 PM
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That's a beauty! Great work Greg.
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Old 01-08-2020, 08:20 PM
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Quote:
Originally Posted by Placidus View Post
Superb work Greg! You've done a most particularly fine job on the tiny dust details across the very centre of the nucleus.
Cheers M & T. CDK's Rock , Mike!

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Originally Posted by marc4darkskies View Post
Now you're talking!
Cheers Marcus. Thanks for the tip.

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That's a beauty! Great work Greg.
Thanks very much, I am quite happy with it.

Greg.
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Old 02-08-2020, 07:30 AM
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Quote:
Originally Posted by strongmanmike View Post
I agree with everything Marcus said

Well done

Thanks Mike. I think that could be a formula, RHA data for the bulk of it and some nice sharp detailed CDK17 luminance data on top. The latest version is a lot sharper, same links.

Mike
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That's a lovely M83, Greg, congrats!
Thanks Lee. Its one of the southern gems.

Greg.
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Old 04-08-2020, 09:51 AM
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multiweb (Marc)
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Terrific job Greg. One for the cool wall. Superb processing.
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Old 04-08-2020, 01:32 PM
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That is a lovely M83, Greg. Fantastic colour, nice to see it so large and well resolved.
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Old 04-08-2020, 03:48 PM
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Quote:
Originally Posted by multiweb View Post
Terrific job Greg. One for the cool wall. Superb processing.
Thanks Marc, that's a nice compliment.

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That is a lovely M83, Greg. Fantastic colour, nice to see it so large and well resolved.
Cheers Bart. These big scopes can get some nice detail under some good seeing.

Greg.
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  #16  
Old 04-08-2020, 04:45 PM
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M83

lovely work on my favourite galaxynice one Greg!
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Old 04-08-2020, 04:46 PM
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Very nice work!

Ecki
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Old 04-08-2020, 08:16 PM
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Quote:
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Very nice work!

Ecki
Thanks very much!

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Originally Posted by graham.hobart View Post
lovely work on my favourite galaxynice one Greg!
I am glad you liked it Graham. Its one of the first images I've done with a lot of exposure time on the ASI183mm.

Greg.
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  #19  
Old 13-08-2020, 09:24 AM
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Nicely processed Greg, great scale, colour etc. Just crop your frame out though.
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Old 16-08-2020, 07:37 AM
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Quote:
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Nicely processed Greg, great scale, colour etc. Just crop your frame out though.
Thanks Paul. Opps I left a bit of edge untidiness did I? I'll fix it.

Greg.
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