« on: September 09, 2012, 03:49:50 PM »
Anyone out there having the same problems while doing night sky?Yes, I happened to take a night shot with stars using a 5D3 yesterday, and I see this precise phenomenom for saturated stars when the default sharpening is used (just tested). When I turn sharpening off, the black halos disappear. I just tried it but am to lazy to produce screenshots for you... just try it yourself. Using unsharp mask as a "sharpening" filter is particularly good at producing black halos.
Well, yours is a very valid point. After reading the tips provided by fellow posters, I went back and put the RAW sharpness settings and unsharp masking to zero before converting the file to TIFF and: halos are gone. So there is a simple cure to all that. Then in post in CS2 I just did some unsharp masking and that was it. Very satisfied about the result halo wise. But I also will take care next time and won't do 45 shots within 15 minutes!
Here's the new sample. I took these RAWs in mRAW.