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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 23 Jun 2013 (Sunday) 19:56
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Save DNG files after Enfusing in LR

 
Architective
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Jun 23, 2013 19:56 |  #1

I can't seem to find a straight answer on this one. Once images have been stacked, enfused and processed the enfused image in lightroom, is there any reason to keep the original DNG files from the camera? The images are ones that I'm selling, and the fidelity of the enfused image is at least that of the original, and the others are hanging around taking up HD space.

What technique does everyone use for this?




  
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x_tan
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Jun 23, 2013 20:36 |  #2

Architective wrote in post #16058433 (external link)
...is there any reason to keep the original DNG files from the camera?...

No, your camera didn't shoot DNG file, it shoot RAW - CR2 in Canon.

Check out DNG Vs RAW here (external link).


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Dan ­ Marchant
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Jun 23, 2013 21:35 as a reply to  @ x_tan's post |  #3

Future post processing technology may offer new ways to process the files that aren't available now. If you no longer have the source files you won't be able to take advantage of that.


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Architective
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Jun 23, 2013 21:58 |  #4

I shoot with CR2 files and I've been having lightroom import them as DNG files. I don't separately keep the CR2 files. Should I?




  
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x_tan
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Jun 23, 2013 22:09 |  #5

You should keep all the CR2 files as Dan said.


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BobbyMartin
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Jun 23, 2013 22:19 |  #6

Keep the CR2 or the DNG. This is preference, (vice keeping both), but definitely have a RAW file stored at all times. Keep in mind that DNGs are considerably smaller and there is no loss of photo data.


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dmward
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Jun 23, 2013 22:32 |  #7

The pixel data in a raw file and the pixel data in a DNG file is the same. Its the wrapping etc. that are different. The reason the DNG version is smaller is perhaps some lossless compression that Adobe applies but I'm not sure about that possibility.

The Adobe logic for developing and promoting DNG is that camea proprietary raw files may at some time in the future be unreadable. i.e. the camera manufacturer no longer has software that will read the format. DNG, as an "open" specification will be supported by Adobe and others even if the camera manufacturer does not support the proprietary version.

What format and how one archives raw images before, during and after processing is a Digital Asset Management decision. Every photographer should have a consistent workflow that includes archiving.


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ssim
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Jun 23, 2013 22:34 as a reply to  @ BobbyMartin's post |  #8

Hard disk space is so cheap these days that I keep pretty much everything. I have 12 TB of space on my network. The key to this conversation is what Dan said. Technology is constantly changing and we may see something new that is interesting. Without those original files you are hooped.

Architective wrote:
I can't seem to find a straight answer on this one.

You write this like there is one definitive answer to it but I am afraid to say that it is not that simple. It really is a personal choice and for me I have already gone back and reprocessed images that I took when I first started digital using the latest converting software. I can say that the latest results are much better and that would be partly due to the improvements in technology and the improvements one gets in doing conversions with experience.


My life is like one big RAW file....way too much post processing needed.
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Save DNG files after Enfusing in LR
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