As far as I know, you lose only metadata. I convert some of my less valuable pics to DNG for backup archiving. The really critical ones are saved as PEF. Paul
> So what is the final verdict on DNG vs PEF ? What do I lose by converting > PEF > to DNG ? Do I lose any picture information or just > metadata, like which lens was used and other things I don't really need. I > need > size reduction from 13MB to 5MB, that is a huge > difference. If I have to keep PEF-s then there is no reason to use DNG. >

