[Leica] DNG

[kanner at acm.org (Herbert Kanner)]

It?s clear to me that a converted DNG, in this case from a Panasonic, is not 
exactly equivalent to a DNG out of an M9. Apple has a couple of applications 
what will directly display a DNG. They will not display a Lightroon 
converted DNG from my Panasonic.

This sucks. I wish Adobe would fix it. I do have to say, however, that I 
have not had any problem processing such fake DNGs in Lightroom.

Herbert Kanner
kanner at acm.org
650-326-8204

Question authority and the authorities will question you.




On Apr 12, 2014, at 9:51 AM, Robert Rose <robert.rose at mac.com> wrote:

> Jayanand,
> 
> I think there is some confusion here, as the text you quoted pertains to 
> ?converted? DNG files, which I understand as a file that started life as 
> something else, such as a NEF Nikon raw file, and then was converted to 
> DNG by some Adobe product, such as Lightroom.  I am not surprised that DxO 
> would not want to touch that.
> 
> All I do know is that the native DNG format from my M9 works great in 
> Lightroom, previews just fine on my Mac, and is what I shoot.  Anything 
> that I need to do with a photo in my workflow I can do in Lightroom, and 
> DNG gives me the most latitude if I need it.
> 
> All the best,
> Bob Rose
> 
> 
> 
> Message: 18
> Date: Fri, 11 Apr 2014 19:56:36 +0530
> From: Jayanand Govindaraj <jayanand at gmail.com>
> Subject: [Leica] DNG
> To: Leica Users Group <lug at leica-users.org>, PSM
>       <psm-1857 at googlegroups.com>
> Message-ID:
>       <CAH1UNJ1pQRu_yu3gA2p7D17pxLQ354+NeTVm9mXy7ySoXrNmHw at 
> mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
>> From a Nikon list about DNG for what it is worth - I have no idea if it is
> true or not. I do not use DNG format, so it is of little concern to me, but
> those who do might want to check it out:
> 
> Quote
> Worth noting that DxO Optics Pro does not (cannot, will not) open DNG files
> for the following reasons:
> 
> "Regarding DNG files. We do not offer currently support for converted DNG
> files in Optics Pro or any of our other produces. Though DNG converted
> files contain the original RAW file information, the information is no
> longer exactly as the camera body wrote it. RAW files are encrypted by
> their manufacturers, and in order to use the information in these files, we
> must decrypt the information using precise information provided to us. To
> do this, it is critical that the information in the file be exactly as it
> was written by the camera, down to the exact location of the data within
> the file. When you convert the original RAW file to the DNG format, the
> decryption information we have fails because the data has been moved.
> Optics Pro is a far more precise program than the other programs you noted,
> so it is imperative that all information be as the camera originally wrote
> it to your camera card. Therefore, we currently do not have any immediate
> plans to offer converted DNG support for input files.  DxO Support Team "
> Unquote
> 
> Cheers
> Jayanand
> 
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