An uncompressed ARW file from my Sony camera has a size of 82 Mb. So, to avoid bottle necks I convert the ARWs to DNGs. The reduction is astonishing, down to a file size of 35 Mb - or 57 percent reduction!
The size is less than the compressed version of the ARW file from the camera. As far as I have been able to find out about this extraordinary gain - the reason should be that the DNA-Converter has more time and resources available on the computer than the file creating software in the camera. Seems plausible.
Actually I have observed artefacts in the compressed ARW files from the camera, but no visible degrading with the DNG files.
If anybody knows more about this subject, which in my opinion is relevant when editing in PS, please let me know. Otherwise I will proceed as a happy DNG->PS man.
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