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Some use Photoshop for combining and aligning subs. I think other software does a better job. The problem with using Photoshop is
what if the image is rotated? Or needs to be scaled slightly in case one filter makes the image a fraction bigger or smaller?
You can use the Transform function (control T) to manipulate the image.
Move the central axis point to the spot where the rotation obviously centres.
I use CCDstack and the ccdisp alignment plugin. It minimises colour bleed in stars from not accurate enough alignment and that gives more pleasing colours.
As far as blurring rgb layer. A lot do that. I suppose the logic is colour does not have sharp boundaries like luminance does. Blurring softens the colour edges and reduces noise. I haven't done that and perhaps I should at times. Occassionally I get a data set where say blue has sharp boundaries for some odd reason. My Baader filters did that a lot. Hard to process out and blurring an rgb layer and especially the blue would have helped.
A common workflow is:
1. Callibrate and align in another specialty program like CCDStack or Maxim DL.
2. Photoshop for processing the images with the help of various plugins to make life easier.
I usually do a colour combine in CCDStack but it doesn't always do such a great job of this and can be a problem area of my workflow. CCDStack colour combine is the weakest aspect of CCDstack in my opinion.
Greg.
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