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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 28 Jun 2010 (Monday) 23:41
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Do you save raw files after converting to dng?

 
itsmejson
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Jun 28, 2010 23:41 |  #1

for those of you who import and convert your raw files to dng into LR,
do you still keep your RAW files around or do you delete them and just work with the dng files?

I am still trying to figure out the best way to do this because having both dng, raw is beginning to take a toll on my HD space.

is it really necessary to keep the raw files once they are converted into dng?

thanks


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tim
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Jun 28, 2010 23:43 |  #2

I have onsite backups in CR2, offsite in DNG. If I converted to DNG when I imported i'd only back up DNG.


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itsmejson
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Jun 28, 2010 23:58 |  #3

tim wrote in post #10445004 (external link)
I have onsite backups in CR2, offsite in DNG. If I converted to DNG when I imported i'd only back up DNG.

great thanks for your input

anyone else?


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René ­ Damkot
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Jun 29, 2010 03:02 |  #4

I keep both. I can work on DNGs when I use LR or ACR. But sometimes I want / have to use DPP so I need the CR2 for that.


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NinetyEight
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Jun 29, 2010 07:25 |  #5

I keep my original CR2's. (after culling the obvious junk in Bridge) I keep them because I sometimes want to use them in Capture One or DPP later.

When importing into Lightroom I select to create a copy of these CR2 files and these copies get saved to another internal hard drive. After doing keywording and any PP work on them I then convert to DNG.

I back up the original CR2's and the DNG's I use as working files.


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lungdoc
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Jun 29, 2010 08:31 |  #6

I do not save CR2's, nor do embed the original RAW in the DNG. To me sort of defeats the purpose of DNG to save both and would be very demanding of disk space. I don't reformat/erase the card until after I have processed the DNG's in LR and exported the jpg's of any keepers and uploaded to Smugmug, with that I have ample backup copies for my needs.


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dugcross
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Jun 29, 2010 09:58 as a reply to  @ lungdoc's post |  #7

I only keep my dng files. Granted they're backed up 3 different times.


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Redcrown
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Jun 29, 2010 11:54 |  #8

I keep the CR2 files until I've completed all processing of the DNG. Then I sometimes selectively save a few of the CR2s, only the ones that presented some unique or difficult challenges. Very infrequently I may reprocess some in DPP.

One thing to remember about CR2 and DNG. All cameras imbed a jpeg in the CR2. Some cameras, like my Canon 5D2, imbed a full sized jpeg, adding several megabytes to the file.

The DNG converter has the option to keep or strip the imbedded jpeg. If you strip the jpeg you save disk space. Considerable disk space on large libraries. Even if you tell the DNG converter to strip the jpeg, it still imbeds a small thumbnail sized jpeg.




  
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spkerer
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Jun 29, 2010 15:46 |  #9

I'm in the "keep the DNG only" crowd.


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ccp900
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Jun 29, 2010 20:39 |  #10

i keep cr2 because sometimes we get much better dng converters down the line and i re-encode to dng...case in point when 7D came out...


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PixelMagic
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Jun 29, 2010 21:19 |  #11

I keep all my RAW files and in my opinion its foolish not to keep them. After sorting and culling, I rename my RAW files into the format I prefer, then use the standalone converter to process them into DNG. All my RAW files are backed up on two external drives and the DNG are imported into Lightroom for processing.

The reason I keep the CR2 is simple. Raw processors are improving over time and both Camera Raw/Lightroom and DPP are still evolving. If I throwaway the original RAW files I cannot take advantage of any possible improvements, especially in DPP.

Also, I can recall several major issues with early versions of DNG. If I hadn't kept the RAW files I would have been unable to reconvert them when the issues were addressed. And given that the public isn't usually aware of problems until after they are addressed I can't see why anyone would dispose of their RAW files. Storage is cheap.

Here's what I recall:
1. An issue with losing "masked pixels" when converting to DNG. Adobe finally addressed the problem with the DNG Recover Edge app.

2. Some early versions of DNG were not fully compliant with the JPEG specifications.

3. Both versions 4.3 and 4.4 of ACR/Lightroom were faulty and were withdrawn shortly after publication. Since then Adobe has issued Release Candidates of every new version to detect and fix any problems prior to final publication. However, one can never be sure that a problem didn't slip through the cracks undetected.

itsmejson wrote in post #10444999 (external link)
for those of you who import and convert your raw files to dng into LR,
do you still keep your RAW files around or do you delete them and just work with the dng files?

I am still trying to figure out the best way to do this because having both dng, raw is beginning to take a toll on my HD space.

is it really necessary to keep the raw files once they are converted into dng?

thanks


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alann
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Jun 29, 2010 21:23 |  #12

I convert to DNG and send CR2 files to a backup drive during import to LR3. That way I always have a backup of every pic I have taken.


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tim
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Jun 29, 2010 21:30 |  #13

alann wrote in post #10450815 (external link)
I convert to DNG and send CR2 files to a backup drive during import to LR3. That way I always have a backup of every pic I have taken.

Culling the rejects is handy if you're a high volume photographer. I take maybe 30GB of images at a wedding, and cull 20G, which adds up pretty quickly.


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Jun 29, 2010 22:37 |  #14

I rename the CR2 and XMP file and then do the DNG conversion into my working directory. I keep the RAW file and work with the DNG in LR. My JPEG conversion has the same filename as the CR2 and DNG. I keep the CR2 for VERY infrequent editing in DPP and as the ultimate photo backup.


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tkoutdoor
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Jul 01, 2010 10:29 as a reply to  @ Tom_D's post |  #15

I've embedded the RAW into the DNG in my first trial with LR3 and my 7D. The file size is quite large and since I shoot a lot of images it's not gonna be workable for me. I'd like to remove the embedded RAW from the DNG's and just keep my CR2 as my backup image copy rather than keeping it in my main library. I haven't been able to find info on this yet this morning. Do you guys know about this (removing embedded RAW from DNG) or could you point me to another thread if there's one around here somewhere explaining it.


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Do you save raw files after converting to dng?
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