On Fri, Oct 26, 2012 at 10:46 AM, Bruce Walker <[email protected]> wrote: > Depends on the camera body. The K10D and K20D create DNGs with no > compression at all, so they quickly fill up SD cards. So I shoot PEF > (compressed) and convert to DNG on import (then nuke the PEFs). > > The K-5 and probably all more recent models (eg K30) create properly > conformant DNGs, all nicely compressed. So if I had one I'd choose > DNG. > > I'm not sure which camp the K-7 falls into.
Lossless compression is a DNG option, not a conformance requirement. So uncompressed DNG files can be just as "properly conformant" as uncompressed ones. It's good to hear that the K5 produces DNG files with losslessly compressed data. It's easy enough to test whether other models do: just output a DNG file and run it through Adobe DNG Converter or export it from Lightroom as DNG with compression turned on. If the resulting file becomes much smaller, you know that the original is uncompressed. > If you have an existing stable of PEFs, there may be a nice way in > Lightroom to force it to reprocess them all and create DNGs from them. > I'm not sure I'd bother myself. It's very easy to convert PEF files (any compatible native raw files, as a matter of fact) to DNG format in Lightroom. Just select all the PEF files in the Library module (grid view) and then choose the "Convert to DNG" command from the Library menu. You will be presented with the DNG options panel ... choose the options you want and click OK. -- Godfrey godfreydigiorgi.posterous.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
