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1st attempt at LRGB - M81


Tzetze
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Hello.  =]

I captured some luminance data on M81 during last crescent moon, but didn't manage to get any rgb data until a couple of days ago.

I reworked a much softer version of the luminance as previous attempt was heavily overcooked. I'm not sure if I've still been a little heavy handed with the luminance processing. Also found it quite difficult to arrive at a final luminosity and saturation I could feel happy with.

For a first attempt at LRGB processing, I'm very pleased with this result. I'm sure there's lots of room for improvement however!

I stacked;

9x900s lum 1x1

9x225s rgb 2x2

15x darks, bias and flats.

Data was captured through Astrodon LRGB using 460ex with a 10" Newt on NEQ6. Stacked and processed in Pixinsight.

766076448_M81270319Final.thumb.png.1357bcc3bacbde268671f40bfc7caa2d.png

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Thank you Lewis and Tomato.

Colour calibration is something I've worked on previously when processing DSLR images taken through an LPS filter. I simply used the same technique on the RGB image while still in its linear form. I have to give thanks to Harry of Harry's Astro Shed and his excellent tutorial videos on Pixinsight processing.

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23 hours ago, Tzetze said:

I simply used the same technique on the RGB image while still in its linear form. I have to give thanks to Harry of Harry's Astro Shed and his excellent tutorial videos on Pixinsight processing.

Seems I need to read some more tutorials or finally invest in Pixinsight - I still find colour balance tricky with PS.

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6 hours ago, harry page said:

Hi

wow wish my first go was this good :)

glad the old vids still help as well

Harry

 

Now I can thank you in person, Harry. Your vids have been, and continue to be, invaluable! Thanks.  =]

6 hours ago, Mr Spock said:

For a first attempt this is outstanding!

Thank you, Michael.

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51 minutes ago, Shibby said:

Seems I need to read some more tutorials or finally invest in Pixinsight - I still find colour balance tricky with PS.

Pixinsight is essential kit, in my opinion. I have little experience of PS, though I know there is a lot of fantastic work done with it. After trialling PI, I found PS to be too convoluted at every step and lacking in it's toolset.

I can't compare to colour balancing in PS, but with PI it  really comes down to being as simple as zeroing in on the fine tuning of a single parameter with easy to read/judge abstracted results.

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Agree with everyone - very nicely captured and your processing has produced a wonderfully natural result.

On ‎03‎/‎04‎/‎2019 at 12:59, Shibby said:

Stunning result! Your first LRGB? The colour balance looks great, I wish I could process my own LRGB data this well.

I am trying to get to grips with PI - my experience of it is a bit up and down* thus far but there is no doubt that it is very useful for colour balancing.  There is a good photometric calibration tool that plate solves your image and applies a user selected colour balance which does a terrific job on galaxies in particular.

* I haven't found PI too much of steep learning curve thanks to Harry's tutorials and those from a couple of others.  It is, by it's very nature, complex because of the number of user variable and parameters (though generally it seems the defaults are a good starting point) but it is a little idiosyncratic.  That said, I'm coming to end of my evaluation period and I'm still trying to bottom out calibration, alignment and integration! 

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16 hours ago, carastro said:

I'd be happy with that for any attempt, let alone a first attempt.

Cracking image and processing.

Carole 

 

12 hours ago, x6gas said:

Agree with everyone - very nicely captured and your processing has produced a wonderfully natural result.

Thanks very much, Carole and x6gas.   =]

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On 06/04/2019 at 06:24, Brian Maurer said:

Really nice, I needed a good one to strive for, doubt I’ll come close, but nice to have motivation.

Thank you Brian. Such a lovely compliment that someone could find this work as motivational. I look forward to seeing your own work on the subject.

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