Lightroom: LR4.1 and 4.2RC do not correctly recognize lens info from Leica M Monochrom

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  • Updated 6 years ago
  • (Edited)
Lightroom correctly identifies the attached lens on my Leica M9P but fails to do so on the M Monochrom. As such, Lens Correction is unable to automatically identify the lens, and needs to be manually set.

Here's what LR sees with the M9P. Notice it detects the Summicron-M 50mm f/2 correctly



Here's what LR sees with the M Monochrom. Notice that the lens info is missing



I thought this might be a problem with the info not being recorded in EXIF, but a check using M9Info (http://www.soens.de/swpage/swpage/m9i...) reveals that the info is in the EXIF for both M9P and M Monochrom files



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Kenneth Wong

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Posted 6 years ago

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Kenneth Wong

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I just did more testing -

DNGs shot from the pre-production M Monochrom cameras running firmware 0.07 show the lens model correctly. The approx f-stop info is captured in EXIF but not reflected in LR.

DNGs shot from the shipping version of the M Monochromes running firmware 0.017 are not showing lens info or approx f-stop at all, even though that information is captured in the EXIF and not showing up in LR

However, using M9Info, all that information is correctly captured and reflected. It's just not showing up correctly in Lightroom.

If any LR engineers would like to look into this, I would be happy to share the DNGs for this to be resolved.
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jdv, Champion

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Lens metadata info is not even close to be standardized. Everyone uses their own slightly different way of storing the lens info. So there are a a variety of ways apps use to cross-reference the metadata and make a determination.

Clearly, tools from Leica are going to know exactly how to find all the details. ExifTool can make a pretty good guess, and might even eventually release a point version that knows all the special cases. Other apps not dedicated to just reading metadata have to apply a set of heuristics, unfortunately. In my experience, Lightroom will leave some metadata blank if it can't make a good determination.
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Kenneth Wong

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Thanks, John!

M9Info is not produced by Leica. It is a 3rd party tool.

Do you reckon that this is a problem that needs to be handled by Leica, or if it is something that Adobe would handle in a LR update?

I find it strange that LR4 reads the lens info correctly from the pre-production firmware (0.07) but not the actual shipping version (0.017)

FWIW, I uploaded a test JPG to Flickr and the lens info - Summicron-M 50mm f/2 (IV, V) - is showing up there as well. Just not in Lightroom. Given what little I know about Flickr, I seriously doubt that they update for every camera out there, so my guess is that the lens info is captured in a fairly standard EXIF field in there

http://www.flickr.com/photos/ghoonk/8...
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Eric Chan, Camera Raw Engineer

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Can you please send a sample raw (.DNG) file to me at madmanchan2000@yahoo.com. You can use YouSendIt.com, dropbox, or similar.

Thanks.
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Kenneth Wong

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Here's a DNG you can use: https://dl.dropbox.com/u/7273678/L100...

LR4.2 seems to have partially solved the problem - in the Lens Correction sub-module in Develop, checking the box automatically calls up the correct lens profile (implying that LR does see it), but it doesn't show up in the Library module under the Metadata sub-module
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Eric Chan, Camera Raw Engineer

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Thanks for providing the test image. But I cannot reproduce your results. When I import the image into Lr 4.2, I see the lens name (Leica Summicron-M 50mm f/2 (IV, V)) in the Metadata panel, using the "EXIF" menu item in the popup menu to the left of the Metadata header.
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Kenneth Wong

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HI Eric

I've just been asked to try to refresh my metadata in the folders. Will try that as soon as I get home and will report findings. This was not working in 4.1 and it is possible that 4.2RC and 4.2 were using the original metadata and not automatically refreshing the info
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Kenneth Wong

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Metadata refreshed, it's showing correctly now :)
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Eric Chan, Camera Raw Engineer

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Great, thanks for following up.
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Kenneth Wong

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Glad it's fixed now!