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07-08-2009, 04:54 AM   #1
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K-7 DNG file size?

Since the K-7's DNG files are supposed to be compressed, are they now as small as the PEFs? I should have mine today, so I'll be able to test myself, but I'm curious if anyone has already done so.

Also, is the compression lossless?

07-08-2009, 06:31 AM   #2
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A quick comparison tells me that the DNGs and PEFs are about the same size. I only shot one picture in each format of more or less the same scene and the DNG came up slightly smaller at 11.5 mb, the PEF was 11.6 mb.
I neither know, nor care if it is lossless compression.
07-08-2009, 06:39 AM   #3
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Great, thank you!
07-08-2009, 07:30 AM   #4
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QuoteOriginally posted by Wheatfield Quote
A quick comparison tells me that the DNGs and PEFs are about the same size. I only shot one picture in each format of more or less the same scene and the DNG came up slightly smaller at 11.5 mb, the PEF was 11.6 mb.
I neither know, nor care if it is lossless compression.
It is lossless of course :-)

I now shoot exclusively in DNG. Previously I was using PEF to gain space and then converted to DNG while importing into Lightroom (OK but slow!). Now importing into LR is so much faster, I love this improvement.

07-08-2009, 08:15 AM   #5
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This is definitely an upgrade.
07-08-2009, 11:17 PM   #6
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Here's a screen grab of DNGs from my K-7, which will give you a good idea of the size and variation:


07-09-2009, 12:05 AM   #7
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thanks jimby not that much larger than K200D DNG size maybe 2.5MB-4MB more.
07-09-2009, 01:01 AM   #8
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Are the DNG-Files already supporting the lens and CA corrections of ACR?

07-09-2009, 07:06 AM   #9
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QuoteOriginally posted by jimby Quote
Here's a screen grab of DNGs from my K-7, which will give you a good idea of the size and variation:

I find it interesting that your K-7 files are, on average, almost twice the size as mine.
07-09-2009, 08:31 AM   #10
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QuoteOriginally posted by Wheatfield Quote
I find it interesting that your K-7 files are, on average, almost twice the size as mine.
To be clear, I do have a late pre-production K-7, but with firmware 1.0. I also have noise reduction turned off, which probably contributes to the file size.

-j
07-09-2009, 01:01 PM   #11
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QuoteOriginally posted by jimby Quote
To be clear, I do have a late pre-production K-7, but with firmware 1.0. I also have noise reduction turned off, which probably contributes to the file size.

-j

I hope, I got a bit scared when I saw those filesizes...especially since I thought they were supposed to be compressed.
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