Data definitely seems good.. Do you have an unprocessed stacked TIFF image that you could upload or email? I've got plenty of spare time to have a play with it if you'd like...
Looks nice enough... black point seems perhaps a little clipped, and yes, the red seems to have dominated the image (as is usually the case with modded DSLRs...)
Its got everything going for it but colour balance and perhaps your Ha blending technique.
Firstly with modded DSLRs you need a custom white balance. Get an 18% photographic grey card and take a photo of it at midday on a sunny day and set the image as the default custom white balance. Do it once and you are set from thereon out.
Now your images will come out of the camera without the infrared red biased images and will look more like normal RGB.
Now you can do that after the fact if you shot using RAW mode files.
Play with your custom white balance to get rid of the excessive red bias.
Or you can do it with Photoshop and curves hitting the red curves hard probably with an S shaped curve. Straighten the last 1/4 of the curve so you don't blow out the highlights.
ha blending is another subject and various ways to do it. As a layer, delete green and blue channel so its only showing in red then set it to lighten mode is one "simple" way. Control the amount using the opacity slider. Screen mode also works but will be more savage and needs to be toned down more with the opacity slider.
Greg.
Last edited by gregbradley; 24-08-2009 at 11:03 PM.
I've had some success adding Ha data as a layer using the luminosity mode and adjusting the opacity slider to anywhere between 50% and 75%.. although this requires more tweaking of the colour layer, generally a boost in saturation and sometimes a few tweaks to colour balance to remove the overly red bias..
Keep at it David.. You'll eventually come up with something you're happy with.
no the blue is there - just there is so much red with Ha - very hard to process
Nice and crisp David. If you have one RGB layer and one Ha, try this in PS. Lay the Ha as Lum on top of the RGB then duplicate the RGB on top of the Ha Lum as soft light and tweak the two layers opacity until you like it. That'll give you a point to start from.
Data definitely seems good.. Do you have an unprocessed stacked TIFF image that you could upload or email? I've got plenty of spare time to have a play with it if you'd like...
Looks nice enough... black point seems perhaps a little clipped, and yes, the red seems to have dominated the image (as is usually the case with modded DSLRs...)
Its got everything going for it but colour balance and perhaps your Ha blending technique.
Firstly with modded DSLRs you need a custom white balance. Get an 18% photographic grey card and take a photo of it at midday on a sunny day and set the image as the default custom white balance. Do it once and you are set from thereon out.
Now your images will come out of the camera without the infrared red biased images and will look more like normal RGB.
Now you can do that after the fact if you shot using RAW mode files.
Play with your custom white balance to get rid of the excessive red bias.
Or you can do it with Photoshop and curves hitting the red curves hard probably with an S shaped curve. Straighten the last 1/4 of the curve so you don't blow out the highlights.
ha blending is another subject and various ways to do it. As a layer and lighten mode is one simple way. Control the amount using the opacity slider. Screen mode also works but will be more savage and needs to be toned down more with the opacity slider.
Greg.
thanks for that information Greg, i will see what i can do about it in the next week or so?
Not a bad image David but I think a little less red with the colour balance will allow the blue to come through and remove the apparent red wash over the entire image.
Howdy, next time I see you Dave bring over the data and I will have a play and seer what I can coax out of it. Ive not had the opportunity to process DSLR images taken under very dark skies yet.
Scott
If you have one RGB layer and one Ha, try this in PS. Lay the Ha as Lum on top of the RGB then duplicate the RGB on top of the Ha Lum as soft light and tweak the two layers opacity until you like it. That'll give you a point to start from. 
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