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Old 11-02-2012, 11:18 PM
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pvelez (Pete)
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HaLRGB for Dummies

The imaging window opened for the first time this year for me last weekend. With so much moon about, I dashed off to Bintel and picked up a Ha filter.

I am now the proud owner of an hour of Ha data for the Tarantula. I've managed to collect some more RGB and L tonight before Mr Moon showed his face again.

So - now what do I do with it? I have been combining LRGB with a combination of Maxim and Photoshop. I also had a play with the technique of combining Ha and L into a single L frame using the Lighten blend mode on PS. The tutorial at

http://www.mistisoftware.com/astronomy/Process_m8.htm

is very helpful. However, I can't get the colour balance right. Perhaps I don't have enough RGB data - I will see tomorrow when I have a chance to play with it.

In case that is not it, can anyone point me to an online tutorial giving some alternatives for combining Ha with LRGB?

Thanks team

Pete
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Old 13-02-2012, 12:54 AM
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Rigel003 (Graeme)
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You could try this from Russel Croman's website.

http://www.rc-astro.com/resources/index.html
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Old 13-02-2012, 01:14 AM
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Tandum (Robin)
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Here's another one -> http://www.robgendlerastropics.com/HARGB.html

Basically you add some Ha to both Red and Lum.
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Old 13-02-2012, 01:11 PM
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You know Graeme, I scannedthat site but couldn't locate the discussion of Ha combination - it was lurking in the text as the heading was tacked on to the discussion of M42. Thanks for pointing it out - I found it this time. I'll give it a go this evening

Pete

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Originally Posted by Rigel003 View Post
You could try this from Russel Croman's website.

http://www.rc-astro.com/resources/index.html
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Old 13-02-2012, 01:12 PM
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pvelez (Pete)
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Quote:
Originally Posted by Tandum View Post
Here's another one -> http://www.robgendlerastropics.com/HARGB.html

Basically you add some Ha to both Red and Lum.
Thanks Robin

I have wrestled with this method - for some reason I still get salmon. I guess its pilot error. I'll have another go tonight

Pete
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