Comments on: DNG Workflow / Part I The latest news about the top pixel wrangling application on the planet. Wed, 27 Mar 2013 13:18:59 +0000 hourly 1 By: emtyness emtyness Sat, 13 Aug 2011 01:52:51 +0000 Do you have the link for the second part?
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By: gladys gladys Fri, 14 Dec 2007 13:09:54 +0000 i get the message “no allowed raw files found”
My pictures are .CR2 , taken with the camera eos 30d.

I cant get Photoshop CS2 to read them, even i have intalled the plug-in.

if anyone can help me i will be very thankful.

By: Katherine Emery Katherine Emery Thu, 08 Jun 2006 04:19:49 +0000 Jeff,

Thank you. This has been the most helpful article I’ve found on the DNG converter and workflow process.

After nearly a year of using ACR with NEF files with no problems, I have added the conversion to DNG as part of the process. And I’m losing a small percentage of images each time. My images are from a Nikon D70 and a D200.

My workflow:
- Copy NEF files directly to desktop.
- Burn a DVD of NEF. Convert files to DNG, and save a copy of DNG on external HD.
- Adjust white balance, exposure using ACR.

I have noticed no problems in doing this. The error occurs when I try to reopen a file in either ACR or CS2. The thumbnail shows the correct changes, the metadata reads fine, but I can’t open the file: “Could not complete your request because the file format module could not parse the file.”

I’ll move my problems to a forum, but thought I’d make the note that this has only occurred since converting to DNG. Thanks so much.

Nikon D200, Nikon D70; Photoshop CS2 (9.0.1); Bridge (3.4); Digital Negative Converter (3.4); Mac 10.3.9; G4.

By: Brian Brian Sun, 09 Apr 2006 00:32:54 +0000 The DNG Converter and Camera Raw download is a zip file that when extracted gives you the new PS plug-in (Camera Raw.8bi) and the converter that is a stand-alone executable (Adobe DNG Converter.exe). Hope this helps.

By: Richard W. Golden Richard W. Golden Wed, 05 Apr 2006 00:54:01 +0000 I just installed the DNG Converter with camera raw 3.3 in my Windows version of PS CS2. The save window in camera raw looks no different, nor can I find anything that looks like a converter that could be left on the desktop. Can anyone offer some guidance? Thanks.

By: Tom Stratton Tom Stratton Fri, 30 Sep 2005 01:09:10 +0000 Big heads-up here…

I just discovered that there is a minor, but very important bug in the DNG converter that pertains only to Mac users.

You are importing an entire drive
You have the subfolders option chosen
There are RAW files in the trash on the drive you are importing from
You have the preserve subfolders option selected

All files in the trash are converted to DNG (and more importantly if you are re-numbering your files, they are assigned names and numbers!) and are then put into an INVISIBLE folder in your destination.

Just something to be aware of!

By: Andrew Stern Andrew Stern Mon, 11 Jul 2005 18:35:32 +0000 Is there a way that I can take a file that has been scanned (Imacon) as a TIFF and open it in camera raw…..can’t seem to find a way…thanks…

By: Jeremy Rowland Jeremy Rowland Wed, 01 Jun 2005 21:04:43 +0000 I wouldn’t let the limitations of today’s third-party DNG and RAW converters make my mind up about converting RAW to DNG. One of the main purposes of the DNG format is to provide a single, open format that (hopefully) will be supported years from now when proprietary RAW files might not be. In an ideal world, digital camera manufacturers will all start using the DNG format natively in their camera. For myself, I’m just getting started in RAW processing, but my plan (as a hobbyist) is to convert the RAW files to DNG, tweak with whichever one gives me more options and/or better results, burn both plus the resulting JPG onto CD/DVD for archiving, and save the JPG on my computer and hopefully never have to worry about either raw files again.

By: Brandon Jackson Brandon Jackson Wed, 01 Jun 2005 15:43:15 +0000 This is a very interesting article and I was looking forward to using Camera RAW 3.0 (or 3.1) and DNG files when I got CS2. However, I shoot with a Sigma SD-9 and while there is support for it, it tends to produce artifacts in bright color areas (particularly yellows & blues) that the Sigma software (and some other RAW converters also) do not produce. It seems that support is lacking for the foveon files and I do understand it may not be a priority to Adobe, however this will keep me from using DNG until Adobe updates their Camera Raw converter. Seems that the newer libraries used by Polybytes (and subsequently Raw Photo Desk) do not suffer from these issues. I t would be nice to use DNG though if Adobe finds time to look at us Sigma users. :-)


By: Don L Don L Sat, 28 May 2005 18:31:42 +0000 Ken,

My guess would be the corruption may be the firewire drive. Have you tried converting them on only your internal drive. I’ve had problems with FW400 when an iSight was plugged in and with FW800 for a few different drives with no apparent reason. For me the FW400 was much more stable than the 800. I’ve switched over to external SATA drives w/o any of the FW headaches.

By: Michael Michael Fri, 27 May 2005 15:44:00 +0000 Well, looks like there are only Canon and Nikon users in here. Why else would you praise DNG so much?

Don’t get me wrong. The idea of one open RAW format is great, but why on earth do they strip data from the original just because they don’t know what to do with it??

When i heard about DNG i was ready to convert every RAW file i have as soon as i get the converter. But luckiely i read about the possibility of data loss before i started.
OK, i could embed the original, but what a waste of space (Embeded original: +8MB and up, embed original EXIF: 1KB?, 10KB?). I’m not into forensics, so i don’t need the original file, as long as all the information is copied to the new one. DNG even keeps the encrytped WB info of Nikon files, because Nikon “might” allow them to decrypt it in the future. What about all the other information that “might” be available if other companies open up their formats? Sorry, lost, we didn’t know what to do with it.

For now, I’m actually better of keeping my originals. DNG only works for me if it keeps all available information. But i’m optimistic (naive?). It’s only DNG 3.1 and there is lots of room to grow. Maybe version 4.1 or 5.1 will do.

Have fun…

By: Charles H. Irwin Charles H. Irwin Thu, 26 May 2005 19:43:52 +0000 Thanks, for this terrific.DNG Workflow by Jeff Schewe. I just want you to know that I have sent all of the Camera Makers the letter that Michael Reichmann, and Juergen Specht were so nice to develop. I hope all of our Photographers will go to, and read What’s New under May 24, 2005, and do as I have done, and send your own letters to all of the Camera Makers. Thanks, to all who have worked to keep our Raw Negatives our property and not the property of anyone else.

By: Andrew Hall Andrew Hall Thu, 26 May 2005 01:47:47 +0000 Jeff

Interested in your comments regarding not needing sidecar files with DNG. My short question is – can you still have sidecar files with DNG – and is this likely to continue to be so?

The longer explanation follows.

I do a lot of PS scripting and I use sidecar files to provide extra functionality in raw processing. Specifically, I create carefully named multiple sidecar files which I use to drive multi-layer processing of *individual* raw files. One sidecar might contain info to process the raw file at an exposure setting of -1, the second sidecar might use exposure +1 (a much simplified example). I find this a very efficient way of pre-processing my raw files as I can get all my colors / white balance / (even sometimes sharpening and noise reduction) how I want them, ready to be processed into multiple adjustment layers, but storage-wise I only have a single raw file and a few sidecars.

It would be far less efficient to have multiple versions of the full DNG for each different raw processing layer.

I realise not many others want to mess with this but personally I find it incredibly useful to:

1. Be able to work fast and efficiently with multiple layers from individual raw files, and

2. Be able to hold images in a preprocessed stage, with an automated system to take them very fast through to the processed stage when I actually want to use the.

Andrew Hall

By: Douglas Urner Douglas Urner Wed, 25 May 2005 16:47:10 +0000 Jeff,

Thanks for your ongoing work to press this issue home. I think it is critical for the ongoing usefulness of the digital images that we’re producing right now. I have no doubt that an open standard will be adopted by — or imposed upon — camera makers. But I fear that the longer this takes the more likely it is that old and obscure cameras will drop through the cracks and the images they procduced will be effectively lost.

Do you know if version 3.1 adds support for integrating DNG Converter into an automated workflow? I’m really hoping that Adobe will add support soon so that DNG Converter can be run from the command line and/or be scripted.

This would be a killer feature and would mean that DNG Converter could streamline workflows, rather than adding a step to them.

Thanks, Doug

By: Ken Tanaka Ken Tanaka Wed, 25 May 2005 07:20:23 +0000 Indeed, Jeff, here is my platform:

- Mac OS 10.4 (and 10.3 on a separate Mac)

- Current DNG Converter version: 3.1 (but I encountered precisely the same issue on all previous versions, starting from the very first)

- Photoshop 9 (CS2), but also encountered the problem on CS.

- RAW files: Virtually all of my RAW files are CR2′s from a Canon 1D Mark II and 1Ds Mark II. Occasionally I also have RAWs from my Canon 10D (CRW’s), although I cannot recall whether or not the corruption occurred with this format.

- Typical Workflow:
1. I always copy my images to a Firewire drive before any processing.
2. Review images with Bridge (formerly CS’s Browser). Sometimes make adjustments in ACR.
3. Exit Bridge, invoke DNG converter and convert.

None of the original RAW images that DNG-C has corrupted has ever shown evidence of damage when reviewed in Bridge (Browser) or when loaded into PS. As I noted earlier, DNG-C never trashes the same images twice. Last night’s work provided a good example. I processed a batch of 45 images (from a 1Ds Mark II) four times. Each conversion produced 1-2 trashed DNG’s and never the same image twice.

It’s hard to imagine that this has not been a very common problem, as I really do not do anything funky with my images and all of my gear, from end-to-end, is in top working order.

Keith may be on to something. It may well be that something in the metadata might be causing this hiccup. But I must also note that I originally suspected that something in the Browser/Bridge preview might be the cause. After running several conversion batches immediately after copying images from my CF cards I encountered the same problems.

Once again, I feel that the DNG initiative may be the most significant initiative before the advanced/professional digital imaging community. It’s fundamental that it succeed, the sooner the better. I am not grousing about the DNG Converter. It’s a new technology and, as with most such products, it still has some kinks. I offer my experiences purely as constructive feedback. I have every intention to continue using the Converter.

By: Scott Buttrick Scott Buttrick Wed, 25 May 2005 02:03:10 +0000 Jeff,

Great article! You convinced me to start converting all my RAW files to DNG. I have a D2x and am a little miffed at Nikon on their position on proprietary encryption. Do you delete your original RAW files after conversion or archive them?



By: Jeff Schewe Jeff Schewe Wed, 25 May 2005 01:30:38 +0000 As of Camera Raw & DNG Converter 3.1, yes, the only proprietary raw file formats that DNG migrates the private maker notes to the DNG is NEF & CR2 files from Nikon & Canon. Some parts of other formats have some of thier private maker notes migrated but it varies by camera and format and the manner inwhich the camera maker does or does not adhear to the EXIF spec.

Future versions of DNG Converter and Camera Raw will expand the cameras and file formats, but i have no information when or what cameras updates will support.

As for other 3rd party converter support, Phase One’s Capture One and & RawShooter already support DNG with a variety of other converters being added. The only restriction is that the odds are the camera companies’ own proprietary conversion software don’t support DNG such as Nikon Capture od Canon’s DPP.

Also to be clear, I’m referring to the undocumented private maker note metadata. The rest of the pixel data is preserved when converted to DNG.

In the past, there was no good way of preserving undocumented and therefore unkown data in a raw file. It’s not safe to read data from an NEF or CR2 for example and try to then re-write data back into those files. Even Nikon has been burned by writting data back into NEF files.

So, to stress the point, DNG does not lock you into having to use Camera Raw. . .DNG does pretty much preclude you using the proprietary camera company’s own software though. has a list of 3rd party support for DNG, see: DNG Support Status as of April, 2005

By: Ed Nixon Ed Nixon Wed, 25 May 2005 00:53:09 +0000 Just so I’m clear in my own min: the only two RAW formats for which DNG Converter will save all RAW information are those of Canon and Nikon.

Consequently, people using equipment from other vendors are constrained to save the original RAW file if they a) want to take advantage of features in another RAW converter package that may exploit features that Adobe doesn’t support and b) have a file that might be processed more completely, better, etc. by some future version of any RAW converter software.

Do I have that straight? Thanks. …edN

By: Andy Frazer Andy Frazer Tue, 24 May 2005 23:19:23 +0000 DNG Converter is also a great tool to check if any of your RAW files have been corrupted on disk. You can’t use a thumbnail browser to check them because it only views the thumbnail files, not the RAW files themselves. This happened to be me two months ago. Some of my RAW files got corrupted due to a disk problem, but the thumbnails looked fine in BreezeBrowser. When I ran DNG Converter on my entire disk, it found half a dozen RAW files that were corrupted, but which looked good in the thumbnailing tool.

By: Daniel M Daniel M Tue, 24 May 2005 21:29:08 +0000 Keith:
Have you tried upgrading to the latest version of the converter? Does it have the same problems?