Yes, I know DNG is propriety to Adobe, but seems to work with most software!
The Pentax uses .PEF RAW files that I can edit & develop in Pentax DCU, but I don't like it very much. I have a copy of Lightroom 2(.7), but it doesn't recognise .PEF. The K-5 can be set to DNG & then I can use LR2.
What is the difference between RAW & DNG & what are the pros & cons of using DNG over PEF?