While I have written before about this noisome issue of purple fringing on stars I have found that the RawTherapee (google it) app does a fantastic job of minimizing this chromatic aberration.
After few clear nights in a row here, I imaged the Rosette Nebula with a 200mm f/5.6 old Pentax telephoto on a Canon T3i unmodded.
But RawTherapee photo program to the rescue! It has a function that can reduce/eliminate the objectionable color and rescue an otherwise useless image! You can see the difference is quite apparent! Then I was able to increase the color saturation without increasing the purple around most of the stars!
After few clear nights in a row here, I imaged the Rosette Nebula with a 200mm f/5.6 old Pentax telephoto on a Canon T3i unmodded.
The chromatic aberration as terrible... purple fringing on the edges of the brighter stars! Yuck!
But RawTherapee photo program to the rescue! It has a function that can reduce/eliminate the objectionable color and rescue an otherwise useless image! You can see the difference is quite apparent! Then I was able to increase the color saturation without increasing the purple around most of the stars!
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