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geni1105
Participant
December 25, 2024

P: DNG Converter - backward compatibility broken?

  • December 25, 2024
  • 2 replies
  • 442 views

The backward compatibility of DNG Converter seems to be broken, in particular it creates Opcode List 2 tags even when "Camera Raw 4.6 and later" or "DNG 1.1" compatibility is selected (both of which do not support Opcode List tags, as they were introduced with DNG 1.3 and Camera Raw 5.4). 

 

This is on macOS 14.6.1 (Sonoma) and I can observe this back to at least version 13.0 (probably the oldest version that still works on Sonoma).  

    2 replies

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    geni1105Author
    Participant
    October 13, 2025

    @Aleke any update on this?

    A
    Community Manager
    AlekeCommunity Manager
    Community Manager
    January 8, 2025

    Hi @geni1105!

    Could you provide more details, like screenshots or a sample of an affected file? Also, which version of DNG Converter are you using?

    Thanks!

    Alek

    *(If you mention me with an @, like @Aleke, I’ll get a notification and can respond faster.)*
    G
    geni1105Author
    Participant
    January 12, 2025

    Here are example files https://www.dropbox.com/scl/fo/bq475f3hsfet80qpslvho/ACJn8oYnNyARCBfLHTBqXiU?rlkey=jil5w83z7s4hwago7r8b8q8ww&dl=0 

    I am using DNG Converter 17.1 but the issues also occurs with earlier versions down to (I think) 12.x

    • DP3M0963.X3F is an original RAW file from a Sigma DP3 Merrill
    • DP3M0963.X3F.dng has been created using x3f tools. As this dng cannot be read correctly by some raw converters, I am running it through a 2nd conversion step.
    • DP3M0963.X3F-conv.dng is the result of the 2nd step, using Adobe DNG Converter with DNG compatibility set to DNG 1.1 (essentially to flatten out the opcode list tags). This works with old version of Adobe DNG Converter (e.g. 10.1) but not with newer versions.

     

    Besides Opcode List 2 tags still present in DP3M0963.X3F-conv.dng, also black levels are wrong and lead to a color cast in dark tones.

      A
      Community Manager
      AlekeCommunity Manager
      Community Manager
      January 13, 2025

      Hi @geni1105! Thanks for sharing this. I've flagged it to the dev team and I'll update you here as soon as I have any news.

      Thanks!

      Alek

      *(If you mention me with an @, like @Aleke, I’ll get a notification and can respond faster.)*
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