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Old 04-06-2019, 08:50 PM
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Atmos (Colin)
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Cats Paw Mix

I'm currently trailing different methods of combining Ha into my DSLR data. Some of it has been taken with the same telescope but others haven't, this particular one has.

Adding Ha to the red channel is super easy... Adding it as a luminance layer is where I've been struggling at times due to how absolutely tiny the Ha stars are compared to the DSLR stars. I feel like I'm slowly getting better, haven't quite got there yet but I'm getting better

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Practice makes not quite so imperfect
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  #2  
Old 04-06-2019, 09:07 PM
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strongmanmike (Michael)
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Some great details in the nebulosity and yes star blend is very close indeed Col...buuut if I zoom right in and then do a roll over comparison with HST.....

Mike
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Old 05-06-2019, 06:02 AM
Placidus (Mike and Trish)
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The blending sounds very difficult.

We'd love to see the H-alpha just on its own. First of the season and all.
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Old 05-06-2019, 07:17 AM
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Atmos (Colin)
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Quote:
Originally Posted by strongmanmike View Post
Some great details in the nebulosity and yes star blend is very close indeed Col...buuut if I zoom right in and then do a roll over comparison with HST.....

Mike
I still want to say “I’ve missed it by that much” with the stars but it’ll do for now
My FOV leaves HST in the dust

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Originally Posted by Placidus View Post
The blending sounds very difficult.

We'd love to see the H-alpha just on its own. First of the season and all.
Thanks Mike
Blending 3 pixel Ha as a luminance into 10 pixel RGB DSLR data on its own looks pretty ugly :/
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Old 05-06-2019, 05:25 PM
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Ryderscope (Rodney)
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An excellent and rich Ha rendition.
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Old 05-06-2019, 09:54 PM
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Atmos (Colin)
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An excellent and rich Ha rendition.
Thanks Rodney

For Mike, this is the raw unedited Ha.
It's 6x900s so nothing special.

In the final version I was naughty and drizzle integrated the data (not enough for a proper drizzle) but that allowed me to deconvolve a lot harder.
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Old 06-06-2019, 04:12 PM
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strongmanmike (Michael)
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Oooh looks good Col

Mike
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Old 07-06-2019, 06:33 PM
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Slawomir (Suavi)
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Looks great Colin - after seeing your image I now want to collect fresh data of this fascinating target and see if I manage to improve on my attempt from a few years ago.
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Old 09-06-2019, 08:51 PM
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Blending Ha into luminance is really the work of the Devil.
You can get away with a small amount but usually too much and you ruin the colour and the Devil laughs as he presents ugly salmon colours.

Yours is fine though so you must resisted temptation and showed restraint!

Greg.
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Old 10-06-2019, 11:17 PM
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Atmos (Colin)
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Quote:
Originally Posted by strongmanmike View Post
Oooh looks good Col

Mike
Thanks Mike

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Originally Posted by Slawomir View Post
Looks great Colin - after seeing your image I now want to collect fresh data of this fascinating target and see if I manage to improve on my attempt from a few years ago.
Your data was a lot better than mine Suavi, that usually happens when you collect 10x the integration time

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Originally Posted by gregbradley View Post
Blending Ha into luminance is really the work of the Devil.
You can get away with a small amount but usually too much and you ruin the colour and the Devil laughs as he presents ugly salmon colours.

Yours is fine though so you must resisted temptation and showed restraint!

Greg.
I have done quite a bit of playing around, so far I’ve settled on combining the Ha into the red channel as the first step AFTER stretching and then adding in the Ha as a luminance towards the end.

I’m still trying to find a way that doesn’t destroy the stars so much though.
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