Why does not Aperture read my DNG file?

If you have a DNG file that Aperture refuses to open, is it possible that the DNG file is from a camera which has a strange format. Aperture 2.1 has support for DNGs from many cameras, but not all.

In some cases Aperture opens some DNG from a particular, camera, but not all. It then may depend on the lens, like in the case of an Olympus E-P2 ORF file.


Another possible explanation is that the DNG was generated with the "Convert to Linear Image" option turned on in Adobe DNG Converter. It has to be turned off. This is not obvious. The Linear Image option is there to increase compatibility compared to "Preserve Raw Image", but it is increased in a way that Aperture cannot handle.


Wrong setting in Adobe DNG converter.


Then, there is of course also the possibility that you cannot import the file, because you do not have any project, or because you highlight the wrong part of the screen, when you do the import. But in this case no files can be imported, DNG or not.