Originally posted by steveknj Thanks. Is there any disadvantage to using DNG as opposed to PEF?
I have not found one. With some older models, the PEF was compressed and the DNG was not, so card space was one potential DNG downside.
I shoot PEF. When I import my files to my computer, I convert them to DNG working copies and archive the PEF files. With the K-7, the only reason for this is that the archive files are easier to identify. Files from my *ist DS could be compressed by almost 50% in the DNG conversion, making computer operations faster.
The Adobe conversion software makes the Pentax Photo Lab unable to open the DNG copy, sometimes annoying. I actually find the new codec annoying too, though I eagerly installed it. Any time Windows looks at a folder with DNG files in it, it tries to create thumbails out of all the images, which takes a significant amount of time. It is easier for me to use CS5 Bridge, which I allowed a lot of space to maintain a thumbnail cache.