Hi Craig,
Loads of texture and detail, plus a wee bit of noise too.
Detail wise, compares very well with Mike's Blue Swan.
Certainly another step in the right direction for this experiment.
My monitor shows an obvious lasso-type halo around the bright star top right though.
plenty of detail there, at least its not blue..... but its still only got one color (red) so for a HaRGB wheres the G and the B.
still stacks of detail makes it an interesting shot
Q. did you use a minimum filter on this to shrink the stars ?
Hi Clive,
Thought there was some blue in there at least. But will have a look again at the colours. And didn't use a minimum filter from memory.
Quote:
Originally Posted by dugnsuz
Hi Craig,
Loads of texture and detail, plus a wee bit of noise too.
Detail wise, compares very well with Mike's Blue Swan.
Certainly another step in the right direction for this experiment.
My monitor shows an obvious lasso-type halo around the bright star top right though.
Doug
A bit of noise in deed. There was only 30 mins of RGB and 50 minutes of Ha. Certainly wouldn't look quite as noisy if I didn't stretch it as much.
Craig,
Great details, but rather heavy on the red weighting - probably due to Ha being the direct replacement for R. Not ideal given the strength of Ha data vs GB is vastly different.
I would suggest splitting the R channel out from the RGB data, but don't directly replace it with the Ha. With the R channel split, blend the Ha data into it (a separate layer all together). Try a 30% opacity in normal or lighten blend modes to start with. It it doesn't need a high opacity as all you're trying to do is colour a little of the Ha data. Deeper reds can be achieved by increasing the opacity, but be careful you don't over do it. Just re-use the original Ha data as the luminance. Once you've got a reasonable balance across the channels, you can start to boost the saturation of the [Ha+R]GB to match the intensity of the Ha luminance. Doing so, will ensure your other colour channels are equally saturated, not just the red. If desired you can perform the multiple luminance layering technique to create a superHaRGB to better match the resolution of the luminance with regards to colour. Trial and error, but you're making improvements. Keep at it.
Jase, thanks again for the comments and will have another fiddle.
The shortage of RGB material does make the direct Ha for R replacement a bit heavy handed as you say so will have another attempt per your suggestions. Still have trouble with blue stars whenever I do the Luminance Ha RGB. Also, there is a lot of variation in the image size between the RGB and the Ha - 1:4 so have to go through a few processes of upscaling and downscaling. But hopefully getting better at it.
Thanks Matt. Using the Lightbuckets combined with the Tak 90 at 400mm and the Canon 450D has its challenges but is a way of getting more detail at not too much of a cost. But long way to go to refine my processing. Craig
, but thought it worth a post as another HaGB experiment. Ha taken last night.
Very nice. I love the details you got in the nebulosity. Very stringy. Very cool pic. 
