Adding Ha data

Hagar (Doug) · #1 26-06-2008, 10:00 PM

Hi Guys,

Well I did it and bought a Ha filter for those moonlit nights.
I am wondering if any of you can help me. I have heard about incorporating Ha data into RGB data to enhance an image. I am using a QHY8 one shot colour camera and wonder what is the best way to do this and is it worth doing this.
Please help and thanks

iceman (Mike) · #2 27-06-2008, 06:17 AM

Hey Doug

The h-alpha data becomes your luminance channel while the RGB is the colour data.

Just use layers in photoshop. This article describes how to do that - just scroll down to the LRGB section.

Hagar (Doug) · #3 27-06-2008, 04:47 PM

Thanks Mike, Looks good all I have to do is get a few clear nights to capture some images.

Thanks again

Tandum (Robin) · #4 27-06-2008, 05:00 PM

I found this one while surfing around. Prolly worth a read.

http://www.robgendlerastropics.com/HARGB.html

Bassnut (Fred) · #5 27-06-2008, 05:41 PM

Doug

Yes, Mike and Robin have provided excellent links, read em both, youll find Ha as the lumanence channel will make a huge difference to yr images, more stucture detail, tighter stars, less light pollution effects, excellent purchase. You will have to expose longer with the Ha filter, but the effort is worth it.

Hagar (Doug) · #6 02-07-2008, 11:06 AM

Thanks everyone, I will read them both. Looking forward to giving it a try as soon as I can get some clear sky. Can't really complain we need the rain and snow to keep our town alive. Just wish it was a bit warmer. Hope it clears for BSG this year.

Thanks again

seeker372011 (Narayan) · #7 02-07-2008, 06:35 PM

Richard Crisp has a somewhat different approach

http://www.narrowbandimaging.com/synthetic_rgb_page.htm