Graphics Programs Reference
In-Depth Information
Adobe created DNG (an open archival format for RAW photos) because, at this
point in time, each camera manufacturer has its own proprietary RAW file format.
If, one day, one or more manufacturers abandon their proprietary format for some-
thing new (like Kodak did with their Photo CD format), will we still be able to open
our RAW photos? With DNG, it's not proprietary—Adobe made it an open archival
format, ensuring that your negatives can be opened in the future, but besides that,
DNG brings another couple of advantages, as well.
The Advantages of
Adobe's DNG Format
for RAW Photos
Step One:
There are three advantages to converting
your RAW files to Adobe DNG: (1) DNG
files are generally about 20% smaller.
(2) DNG files don't need an XMP sidecar
file to store Camera Raw edits, metadata,
and keywords—the info's embedded into
the DNG file, so you only have one file to
keep track of. And, (3) DNG is an open
format, so you'll be able to open them
in the future (as I mentioned in the intro
above). If you have a RAW image open
in Camera Raw, you can save it as an
Adobe DNG by clicking the Save Image
button (as shown here) to bring up the
Save Options dialog (seen in the next
step). Note: There's really no advantage
to saving TIFF or JPEG files as DNGs,
so I only convert RAW photos.
Step Two:
When the Save Options dialog appears,
at the bottom of the dialog, from the
Format pop-up menu, choose Digital
Negative (shown here). Once you
choose Digital Negative, a new set of
options appears at the bottom of the
dialog (seen in Step Three).
 
 
 
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