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L
Leithal
Participant
November 28, 2023
Answered

Lightroom 13.0 merged dng files are suddenly very small

  • November 28, 2023
  • 1 reply
  • 4252 views

I have updated to LR 13.0 and found that merged dng files (for panoramas) are now very small. For example, I merged three 76MB RAW files and the resulting dng was only 18MB. Normally the merged dng file would be more than 200MB. However I found that when I exported the dng file as a tiff without compression at 300dpi it did exceed 200MB. 
I've gone back and checked previous merged dng panoramas and observed that they were very large but when I merged them again in the 13.0 version of LR they suddenly dropped down to about a tenth of the files merged before updating.

I am using an M1 Mac Mini and running Ventura.

What's going on? Any ideas? 

    Correct answer Jao vdL

    Adobe updated the compression algorithm they use in merged panoramas, HDR and enhanced dng images to jpeg XL compression which is far more efficient than the jpeg compression they were using before that. So that's what you're seeing the effect off. There is no loss in quality as a result just much more efficient compression.

    1 reply

    J
    Community Expert
    Jao vdLCommunity ExpertCorrect answer
    Community Expert
    November 28, 2023

    Adobe updated the compression algorithm they use in merged panoramas, HDR and enhanced dng images to jpeg XL compression which is far more efficient than the jpeg compression they were using before that. So that's what you're seeing the effect off. There is no loss in quality as a result just much more efficient compression.

      L
      LeithalAuthor
      Participant
      November 28, 2023

      Thanks very much for that and you were so quick. Seriously, you'd think Adobe would explain this.

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