M11 creates two DNG files (e.g., L1001234.dng and L1001234-2.dng) for each exposure -- sometimes -- why???

[michaelbrenner]

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Sometimes my Leica M11 produces two DNG files for each exposure.  One seems to be processed (HDR maybe?).  One files is named something like L1001234.DNG while the other will have a "-2" added to the name.  For example, L1001234-2.DNG.  I cannot for the life of me figure out why it does this *sometimes*.  As an example, I just took a few pictures, noticed this was occurring, and then took a few more pictures -- and it stopped occurring.  Maybe when the exposure can benefit from HDR, it produces a second, processed DNG?  But, how does one turn this functionality on/off?

What is driving me crazy is the result is only produced sometimes, not all the time, and I'm not sure what triggers it.

[SrMi]

How do you determine that M11 generated the two files? By looking at the SD card directory or your import directory? This looks to me like an import renaming when a second import of the same file gets renamed.

[elmars]

I was just about to ask the same question. Lightroom does this when there are duplicate images.

[frame-it]

1 hour ago, michaelbrenner said:

Sometimes my Leica M11 produces two DNG files for each exposure.  One seems to be processed (HDR maybe?).  One files is named something like L1001234.DNG while the other will have a "-2" added to the name.  For example, L1001234-2.DNG.  I cannot for the life of me figure out why it does this *sometimes*.  As an example, I just took a few pictures, noticed this was occurring, and then took a few more pictures -- and it stopped occurring.  Maybe when the exposure can benefit from HDR, it produces a second, processed DNG?  But, how does one turn this functionality on/off?

What is driving me crazy is the result is only produced sometimes, not all the time, and I'm not sure what triggers it.

IF its not an import problem, are the histograms of the 2 files the same or wildly different?

[michaelbrenner]

Great points.  I went back and took a closer look at the filenames.

Lightroom is downloading the DNG and the JPG and treating them as separate exposures instead of showing a preview of the DNG and keeping the JPG in the background associated with the DNG.

In some instances the file names are L1009326.DNG and L1009326.JPG and in other instances L1009325-2.JPG and L1009325.DNG.

The thing that is really aggravating is when I attempt to reproduce the problem, everything works fine.

For example, earlier today, I made about 5 exposures but notice the Lightroom import preview had 10 files.  When I imported them they are all paired DNG/JPG sets.  I formatted the SD card and then took an other exposure in an attempt to reproduce the problem, but it imported just fine.  I took another and just fine.  The problem appears to be intermittent, and I have no reason what is causing it.

So I'm guessing this is a Lightroom issue and not a Leica issue?

 

[frame-it]

in Lightroom Classic > Preferences / General tab / import Options section check the box that says 'Treat JPEG Files Next to Raw Files As Separate Photos'.

[michaelbrenner]

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In Lightroom, the "Treat JPEG files next to RAW files as separate photos" is unchecked under General in Preferences.

Of course the obvious work-around is to set the M11 so it only takes DNG's.  I've always captured in DNG+JPG even though I have yet to actually do anything with a JPG file...

[michaelbrenner]

This post explains the problem, but does not suggest a solution, except to insist that the problem doesn't exist when clearly, six years later, it still exists.

https://community.adobe.com/t5/lightroom-classic-discussions/lr-classic-does-not-merge-raw-and-jpeg-while-importing/m-p/9915853

[michaelbrenner]

Has anyone else run into this problem?

[michaelbrenner]

Reddit thread (no answer, just a description of the problem with suggestions that didn't work):