From: Eric Weir
So RAW and DGN are the same thing?
Not quite.
.DNG is one raw format, .PEF is another. Pentax DSLRs can save raw files
in either format. All .PEF files are raw files, all .DNG files are raw
files, but not all raw files are .PEF or .DNG files.
And since Panasonic uses .RAW as their raw file extension, all .RAW
files are raw files, but not all raw files are .RAW files. A .RAW file
may not even be a camera file, because Real Audio and Win Amp both have
a .RAW file of their own.
(Yes, I have taken my pain medicine!)
Nikon raw files are .NEF. Canon raw files are .CR2; Sony has .SRF or
.SR2 ...
The "advantage of DNG" is that Adobe will *ALWAYS and forever* support
.DNG, since it's their own "camera raw" format. They offer a free
stand-alone DNG converter.
If you get a new camera whose raw file format is not supported by the
Adobe Camera Raw that came with your (older) version of PhotoShop, and
you don't want to upgrade PhotoShop, you can download the latest and
greatest DNG converter, shoot raw and process them into .DNG files using
the DNG converter.
Then you can open them in any version of PhotoShop since PhotoShop7.
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