I've shot with Nikon, Olympus, and Panasonic so I'm familiar with all their proprietary RAW formats that each uses. I'd like to convert all my RAW files to DNG and then use that on import into LR going forward.
I noticed that the DNG files from the Panasonic or Olympus images don't display a thumbnail in my finder folders (Mac OS X) so I tried some experiments:
I used the "convert to DNG" function in LR for some RAW files from each of the 3 cameras. Only the images taken with the Nikon D5300 show a thumbnail image in my finder folder. The Oly and Panny shots only display the DNG icon.
Next I used the "export to DNG" function thinking that might make the thumbnail available but it was just the same. I would like to be able to see the images in my finder folders and also be able to open them to view in "preview" but only the Nikon converted DNGs will open in preview and not the Panny or Oly DNGs.
Am I doing something wrong in the preferences? I've attached a screen shot of my preferences settings for DNG in LR and the thumbs that I'm seeing in my finder folders.