This is a stack of 35 x 25 sec subs at ISO 1600 taken with a Sony Nex-3 camera and a 12' LX200 with no guiding and only alt/az tracking stacked in DDS
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I noticed that not all only some stars have a blue section at one side and the brightest stars have a flare pattern around them.
I was hoping that someone might help me to know what this is and how to fix the problem, I don't know if it is a setup problem with the scope, camera or stacking software.
This problem has appeared on only some of my images and seems to be effecting stars at random throughout the image.
I am a little lost as to what causes this so any help is appreciated, thanks Wayne.
Agree with Marc. I took the liberty of downloading one into Photoshop, and it took mere seconds with a median filter to remove any trace of them. I think stacking artifacts, or a possible Bayer matrix misalignment - check DSS is using an appropriate RAW Bayer Matrix Transformation setting - try different ones.
I'd be more worried about the very slightly eggy stars. Hard to see how miscollimation results in chromatic artifacts. As previous posters have said it's probably a stacking artifact. Nice picture.
Only stacked in DSS. Ok. Did you adjust saturation and curve, in DSS ? It seems you did it too much.
The image is very nice, but DSS is not the best place to enhance photos. They say it, on its documentation.
Thanks everyone for your comments, the collimation of the scope seems to be ok I am sure it must be stacking artifacts. All the subs were taken as jpg files and stacked in DSS then I used GIMP to process after stacking. I don't have Photoshop to remove then as you did Lewis but I tried every type of filtering method I could find in GIMP but no change, I converted every sub to tiff files and restacked but no change.
Next time I will try taking the subs in raw format (Sony ARW files) and see if that changes anything.
Good shots Wayne , it looks like a tiny bit of miss-columination in the scope . 
