3 Replies Latest reply on Aug 5, 2014 2:04 PM by ssprengel

    Color artifacts in DNG files

    Alexander Walter

      Hi, I've got a major issue with Adobe PS Lightroom DNG import on my Mac from my Canon EOS 5D Mark III. Any image converted to DNG file format is showing heavy color artifacts around edges, whereas the color of the object in focus is abruptly replaced by a grey border and the missing color is repeated after the edge. I know this sounds weird and I've already spoken to experts and even sent my camera to Canon for a check-up. Now I realized that this issue doesn't occur in the proprietary Canon CR2 RAW image files but in the DNG files in Lightroom only. Has anybody at Adobe a faint idea how to solve this?


        • 1. Re: Color artifacts in DNG files
          ssprengel Adobe Community Professional & MVP

          Those gray halos on the edges of green and purple areas are from the Defringing lens-corrections area, so check your Defringing settings in ACR for the camera you’re using. 


          The Defringing function can’t tell the difference between purple and green halos caused by lens problems and purple and green edges of the subjects, themselves, so you have to be careful with it and probably shouldn’t Defringing on by default. 


          The Defringing slider of the Adjustment Brush can be used to reverse extra defringing that shouldn’t have occurred like you’ve pictured, or the Adjustment Brush with a positive Defringing amount can be used to reduce fringed areas visibility if you don’t want to use the automatic Defringing sliders.

          • 2. Re: Color artifacts in DNG files
            Alexander Walter Level 1

            OMG! Thank you so much! Strange, because this was my first thought to be the culprit but I didn't follow up. I guess I have to repeat the basics in physics and chromatic aberration...

            • 3. Re: Color artifacts in DNG files
              ssprengel Adobe Community Professional & MVP

              I can’t explain why it’s only happening for DNGs compared to CR2 files if both are newly imported, unless LR has separate default settings for native-raw vs DNG-raw files for a particular camera.