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funkyspion
funkyspion
Participating Frequently
September 19, 2023
Question

Problems with exporting DNG files on IOS 17

  • September 19, 2023
  • 2 replies
  • 2155 views

There is a problem when exporting DNG files on on iphone/ipad after upgrading to IOS 17/iPadOS 17 -> instead of full size files only small sizes (192x256px) are saved on an iphone/ipad (when I tried to export DNG files to dropbox - everything was OK - the size was 6048x8064px).

 

Is there any suggestion how to fix it? Is that a bug or do I make something wrong?

 

Mariusz

    This topic has been closed for replies.

    2 replies

    funkyspion
    funkyspionAuthor
    Participating Frequently
    September 22, 2023

    I want to report a bug on Lightroom mobile. There is a problem when exporting DNG files on iphone/ipad after upgrading to IOS 17.01/iPadOS 17.01 -> instead of full size files only small thumbnails (192x256px) are saved on an iphone/ipad (when I tried to export DNG files to dropbox - everything was OK). Moreover the file saved as DNG on phone/ipad is marked not as RAW but as TIFF.

     

    When I follow the same procedure (exporting DNG on the phone) on Lightroom Mobile on IOS 16.x everything is OK (full size RAW picture is visible in photo library of the phone).

      funkyspion
      funkyspionAuthor
      Participating Frequently
      October 9, 2023

      Still the problem is not solved with new Lightroom Mobile v9.0 😞

      funkyspion
      funkyspionAuthor
      Participating Frequently
      November 16, 2023

      Problem still not solved with new upgrade LM v9.01. After two months - I'm very disappointed such a key issue wasn't solved.

      JohanElzenga
      Community Expert
      JohanElzengaCommunity Expert
      Community Expert
      September 20, 2023

      I have not upgraded iOS yet, so I can't check what happens. However, if you can export full size images to Dropbox, then you should be able to export full size images to the camera roll or to the Files app using the same method.

       

      -- Johan W. Elzenga
      funkyspion
      funkyspionAuthor
      Participating Frequently
      September 20, 2023

       This is a screenshot of saved on the phone DNG file - the problem occurs only in IOS 17 on iphone/ipad.

      funkyspion
      funkyspionAuthor
      Participating Frequently
      September 21, 2023

      There still is something odd, which makes me believe that iOS17 displays the thumbnail, not the real image. Again, look at the file size. That tiff is 39.1 MB!!! There is absolutely no way that a (non layered) 192x256 pixels tiff file can be 39.1 MB. An uncompressed 192x256 pixels 8 bits/color tiff is 192x256x3 bytes. That is way less than one megabyte. Even a 16 bits tiff with those dimensions is way less than 1 MB.

       

      A 2990 x 3987 pixels 8 bits/color tiff is about 35 MB, so with metadata and an embedded preview this could well be 39.1 MB...

       


      I cannot enclose tiff file here - but I opened it on my PC and saved as JPG - as you can see - the picture is 192x256 px size and it looks like the thumbnail. Again - I have one iPhone with IOS16 and one with IOS17 - the result of the same process in Lightroom Mobile is completely different: when exporting DNG file on IOS16 I get full size DNG file (24,8 MB marked as RAW), when exporting the same file on IOS17 I get a tiff thumbnail (192x256px, 37,2 MB, marked as TIFF). As it looks strange to weight of the file is 37,2 MB and size: 192x256px.

       

      Is there anyone who upgraded his iPhone to IOS17 encounterd the same problem? I mean without upgrading you cannot experience the same situation as I.

       

      Here is a file saved as DNG (which resulted in TIFF file, small size), changed to JPG:

       

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