Lightroom will not compress DNGs on import if the source file is
already in DNG format. It just copies them to the destination you
target on import. (It will only copy when the source is a memory card,
not move or open in place, IIRC.) When LR exports DNG, they are
compressed DNG files.
DNG Converter (and Camera Raw) will take uncompressed DNGs and output
them as compressed DNGs.
Best thing to do with Pentax cameras is use RAW-PEF in camera to keep
the file size as small as possible on the memory card, then import
into Lightroom with on-the-fly conversion to DNG. Then they are stored
as compressed DNG files in the destination directory, if you have the
preferences set correctly as Bob suggests.
Godfrey
On Dec 30, 2008, at 5:20 PM, Bob W wrote:
You can configure the import preferences. On the Import... dialog in
the
File Handling dropdown there is an option to import as DNG. And on
the Edit
menu choose Preferences then the Import tab to set your compression
options.
Bob
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Mark Erickson
Sent: 31 December 2008 01:04
To: [email protected]
Subject: Another Pentax/Lightroom question
Here's a question for you....
With CS2/Bridge, my image input workflow went like this:
1) Take images using ACR raw format.
2) Point Bridge at my SD card
3) Open all images using ACR (3.7, I think)
4) Save all as DNG to an "incoming" folder
ACR did a nice job of compressing the DNGs when it saved. My
K10D images
were typically ~16MB out of the camera, and would be down to
around 10MB or
11MB with nondestructive compression applied.
When I try to do a similar operation using Lightroom 2.2, it
appears that
Lightroom just copies the images untouched into the
distination "incoming"
directory without compressing them.
Anyone know how to change this? Should I just shoot using
PEF instead?
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