Peter Sills wrote:
[snip]
As for DNG, I LOVE Adobe! I just think that they got this one
wrong. Instead of creating a format and trying to establish it as
a standard without really working with the camera manufacturers,
they should have developed a format WITH the manufacturers.
Adobe discussed the idea of DNG with the camera manufacturers at the start of 2004, long before DNG was launched at the end of September 2004. Only Leica and Hasselblad supported DNG at that time.
The camera manufacturers have always been part of the problem, most of them showing no signs of wanting to be part of the solution. ANY camera manufacturer could support DNG out of their camera if they chose to, without screwing themselves up. For example, they could support it as an extra option. And 3 cameras and 4 digital backs already use DNG as their native raw formats, so it is obviously possible to use it.
There
is a great deal of proprietary information in the RAW files of many
of the cameras out there. This will not come through the DNG
conversion (though you have the option of embedding the original
RAW file into the DNG conversion - though you get an enormous file).
Where Adobe knows the nature of that proprietary information, it puts it into a field called DNGPrivateData, where any software that understands that data can pick it up. But camera manufacturers have typically refused to disclose to Adobe the nature of that data, even though they have been asked. So if any data that isn't stored there, the fault lies with the camera manufacturer.
Much of this information is about how a particular camera behaves
under certain conditions, etc. Is the information significant, in
many cases it can very well be - for the professional photographer.
For the vast majority of those people out there, no, it will not
be. In the end run, DNG may be safe and easy - camera specific RAW
formats wiill be a bit riskier but always the best file for the
image.
Any photographer who uses ACR should not see any differences if DNG is used. DNG holds, in its "public" parts, all of the data that ACR needs. So the following routes give the same results:
Native raw > ACR > Photoshop.
Native raw > DNG Converter > DNG > ACR > Photoshop.
Photographers can do a similar test with their raw converters and photo-editors of choice. Typically it will be those who use the raw converters supplied by the camera manufacturers who see a difference. Or who use raw converters that know a lot of unpublished stuff about the proprietary information in those raw files.
--
DNG is better than sliced bread;
DNG images don't become toast.