"Alfred Molon" <a@b.c> wrote in message
news:MPG.214f96e92e746a2a98b6de@news.supernews.com ...
> Is it possible?
> --
I know from my experience with converting CR2 files to DNG, if you chose to
imbed the original raw file within the DNG when you converted it then yes,
you can extract the original raw file.
"ray" <ray@zianet.com> wrote in message
newsan.2007.09.10.18.03.58.685979@zianet.com...
> On Mon, 10 Sep 2007 19:01:50 +0200, Alfred Molon wrote:
>
>> Is it possible?
>
> DNG is RAW.
If you were to convert say a CR2 to DNG and did not imbed, then Canon's DPP
will not read that RAW file. I'd bet that is what he is talking about.
Alfred Molon <a@b.c> wrote:
> In article <pan.2007.09.10.18.03.58.685979@zianet.com>, ray says...
>
>> DNG is RAW.
>
> No. I mean the original format. Can you go back?
Only if you embedd it. If you convert to DNG and don't embedd, why would you
want to go back? The reason for doing this in the first place indicates you
would not want to do this.
Long answer is that most vendors embedd private data in RAW files that can't
be carried over to the DNG (Nikon "encypts" white balance information for
instance), so it is not possible to legitimately do so.
--
Thomas T. Veldhouse
We have more to fear from the bungling of the incompetent than from the
machinations of the wicked.
Alfred Molon <a@b.c> wrote:
> In article <pan.2007.09.11.15.54.26.950561@zianet.com>, ray says...
>
>> Maybe yes, maybe no; what's the original format?
>
> ORF, NEF, CRW whatever. Since all information (apparently) is contained
> in the DNG, it should be possible to convert back to RAW.
Not all the metadata information is in the DNG. Nikon, for instance, encrypts
white balance information in the NEF that is not accessible to the DNG.
--
Thomas T. Veldhouse
We have more to fear from the bungling of the incompetent than from the
machinations of the wicked.
What's the file size of a DNG with embedded info compared to the original
raw file?
"Thomas T. Veldhouse" <veldy71@yahoo.com> wrote in message
news:dCAFi.1329$vq6.1288@textfe.usenetserver.com.. .
>
> Only if you embedd it. If you convert to DNG and don't embedd, why would
> you
> want to go back? The reason for doing this in the first place indicates
> you
> would not want to do this.
On Tue, 11 Sep 2007 18:44:29 +0200, Alfred Molon wrote:
> In article <pan.2007.09.11.15.54.26.950561@zianet.com>, ray says...
>
>> Maybe yes, maybe no; what's the original format?
>
> ORF, NEF, CRW whatever. Since all information (apparently) is contained
> in the DNG, it should be possible to convert back to RAW.
It should be possible to convert back to the same raw format, but the file
would not be identical. For example, some proprietary metadata will be
lost. I'm not aware of any software that will accept dng and produce
various raw formats.
Converting DNG to RAW 
an.2007.09.10.18.03.58.685979@zianet.com...
Linear Mode
