Originally posted by tackylady1 Not sure what the difference is with the DNG and PEF. Do you know?
DNG is a 'standard' RAW format introduced by Adobe. PEF is Pentax's proprietary RAW format.
Adobe pushes DNG because they have more control over the format and I assume can adapt their software faster. Size wise I don't think there is a significant difference. One area where DNG is IMHO superior is that metadata is embedded in the DNG file rather than in an XMP 'sidecar' file as with other formats. So you don't have to worry about losing the sidecar file. Not a big deal but I think it makes things cleaner.
If you use Adobe software, then DNG is a good choice over proprietary formats. You are more likely to have compatibility for new cameras for example. On the other hand if you use the Pentax software I don't think it will read DNG. Not 100% sure of that though.
Originally posted by tackylady1 So it doesn't matter what camera brand you are using? They all use the DNG files?
I think only Pentax uses DNG in camera but Lightroom will convert to DNG from any RAW format on import. Not sure about PS.
Also there is a stand alone converter that will convert PEF into DNG. So if you cannot get PS to see PEF that might be an alternative. But it sounds like you don't have Adobe Camera Raw installed properly and without that you might not be able to see DNG either.