The sensor represents a sea change for Pentax. Goodbye 10.2 megapixel APS-C Sony CCD chip, and hello 14.6MP CMOS courtesy of a partnership with -- surprise, surprise??--Samsung. Goodbye 22/bit A/D conversion, but hello 14/bit A/D conversion and 12/bits channel RAW, which again comes in Pentax (PEF) and/or Adobe (DNG) flavors. We're big fans of standardized formats, and we applaud Pentax for being one of the few early adopters to allow the user a choice of camera-brand proprietary or the semi-open source Adobe RAW format. The K20D ships with the Pentax Photolab 3.5, for processing the PEF (or DNG) formats. But the DNG format, being mostly universal, means you don't necessarily have to wait for upgrades to your other RAW-capable programs, such as Adobe Camera RAW, Adobe Lightroom, Bibble Labs and so on, or any of the independent RAW-capable HDR programs such as Photomatix Pro, FDRTools, Dynamic Photo HDR and such. Just shoot DNG and you're good to go without waiting for compatibility ugrades!