[Leica] M9 DNGs and Adobe

[hopsternew at gmail.com (Geoff Hopkinson)]

Yes the bug is only in LR 2.6 and ACR 5.6. Although M9 users are a very
small group compared to say Canon or Nikon Adobe customers, enough people
reported the problem so that the fix is underway. The Adobe user forums
contain the discussions (You can join free). The problem is known and
acknowledged by Adobe there. Some of their senior people participate in
those forums, which is to their credit as a company. They apologised and
explained and have promised  a further fix.

Using the LR2.6 Release Candidate (the old beta) did work when they
initially made it available again since it did not have the later
alterations to improve M9 rendition. Then they made the LR2.6.1 version
available for M9 users. Non-M9 people should not install it because of the
version mismatch complication. If you are using LR2.5 you should use at
least 5.4 for best compatibility. Don't forget the excellent LR3 beta.

Ed, the bug is apparently triggered by particular tonal value combinations
(RGB numbers)! which is why you only see it sometimes. The bug was always
there in Camera Raw 5.6 but not reported by users at the same time. I guess
it was because M9 users got the free download of LR and maybe those were new
Adobe customers?

Sorry about more acronyms, uncle Rabs, however I hope that they are clear
within the context.

Cheers
Geoff
http://www.pbase.com/hoppyman


 On 12 March 2010 01:19, Bob Adler <rgacpa at yahoo.com> wrote:

> I noticed this issue when you had me upgrade LR to 2.6.1 Geoff. :-)
> I still use LR Camera Raw, but when going to edit in CS4, I "Let Lightroom
> Do Rendering". Any problem with this approach?
> Best,
> Bob
>  Bob Adler
> Palo Alto, CA
> http://www.rgaphoto.com
>
>
>
>
> ________________________________
> From: Geoff Hopkinson <hopsternew at gmail.com>
> To: Leica Users Group <lug at leica-users.org>
> Sent: Thu, March 11, 2010 5:38:58 AM
> Subject: [Leica] M9 DNGs and Adobe
>
>  For anyone interested:
> M9 users found that some DNG files caused crashes in Photoshop CS4 and
> Lightroom 2.6 (a particular RGB number combination). Adobe found a bug
> introduced when late changes were made to the Raw processing engine to
> improve rendition of M9 files. The current fix for LR2.6 users is to
> download and use LR2.6.1. The only change is the elimination of that bug
> and
> it is only relevant for M9 users. The problem does not occur with the LR3
> beta (which also has significantly better rendition, noise reduction and
> sharpening powers).
>
> I have recently done a complete new clean install on a new sytem (64 bit,
> Yeah!)  and am only just catching up. I have found that the bug exists in
> Adobe Camera Raw 5.6 as well, however there is no ACR5.6.1 available
> currently. Adobe has acknowledged the issue with both LR and ACR and
> reports
> that a fix will be available shortly. In the meantime I need to stay out of
> Adobe Camera Raw with M9 files and as a minor issue, trying to edit a DNG
> in
> Photoshop (from LR) reports the mismatch in versions as well, once you
> install the LR2.6.1 although the cure is not yet here. I don't have the
> LR2.6RC (release candidate) any longer. It did not exhibit the crashing
> behaviour but I don't know if version matching was an issue there.
>
> Personally I am looking forward to the release of LR3 and I hope a cheap
> upgrade. Mant M9 owners tht already own LR are waiting to find out if they
> will be able to use their entitlement to download LR to receive LR3. We
> shall see.
> Incidentally, the X1 already has a standard profile (usable in both
> applications of course) although the S2 does not. Neither X1 DNG files  nor
> those from the S2 provoke the bug.
>
> Cheers
> Geoff
> http://www.pbase.com/hoppyman
>
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