EXIF lens identification error
The EXIF data for photos taken with a Samyang 18/2.8 mistakenly attribute the photo to a Batis 18/2.8. I also assume that the lens profile is configured for the Batis rather than the characteristics of the Samyang. I'm wondering if a future Capture One release will recognize and support the newer Samyang AF lenses. Unless there is some advantage to mapping the Samyang to the Batis, I think it is a mistake to do this because it assigns erroneous metadata to images. Also, if I had both the Samyang and the Batis and wanted to use and compare the two, I would not readily know from EXIF which image was taken with which lens. Any comments from Capture One about this? Thanks.
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Good luck on that. Since Capture One 10, I have been asking that the Lens ID from Panasonic JPGs be extracted and shown, with no success.
My recent ticket on this topic recieved a complete technical non-sequitar, stating that because there are no lens profiles in a JPG this is technically impossible.
Best of luck.
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@Walter The question was quite clear - Can C1 show the Lens ID from JPG files from Panasonic cameras. I've responded with an attempt at clarification, but I think I'm being ignored.
I think the missing link may be that Capture One support is thinking the lens ID is important because the photographer or Capture One needs to know what lens correction to apply. A photographer would rarely choose to apply a lens correction profile to a JPEG image because it already has undergone lossless compression, and applying a lens correction will degrade the image quality because the file detail is gone. For this reason lens corrections are applied before the camera does JPEG compression.
The real reason (beyond the assigning a profile) we as photographers need to know the Lens ID is that different lenses have different behaviours such as flare, coma, ghosting, field curvature, chromatic aberation, bokeh and resolution, so we need to select images taken with a certain lens either for the purpose of choosing the a partticular type of image, or for learning more about the performance of a lens.
But its hard to discuss this with someone who's not listening.
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My situation should have nothing to do with JPG attributes since I upload compressed RAW files only into C1. My final step is processing and exporting JPGs. I am seeing the misidentified lens in the C1 metadata prior to JPG conversion.
The Samyang lens has electrical contacts that presumably tranmit data about the Samyang lens, not about a Batis lens. The only things the two lenses are likely to have in common are the focal length and the minimum aperture. The rest is anyone's guess. If the lens data provided by my Sony camera to the RAW file is for a Samyang lens, how in the world can C1 interpret that as a Zeiss lens? I am befuddled by this. I have many manual and legacy lenses that are unknown in the metadata and fully understand why that is so. I'd rather that C1 treated the Samyang as an unknown lens if the software does not have a profile for it rather than substituting a different lens value and profile. I am surprised that C1 would justify this behavior.
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@Eric Pepper Apples Preview also reads the EXIF data. It would be intersting to note how Preview reads the EXIF from your RAW file.
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Exiftool on an ARW file shot with the Samyan lens (image downloaded from the net) reports:
Lens Model : SAMYANG AF 18mm F2.8
I got curious. There is a comment a flickr group about this issue, too. Someone found a workaround using Adobe bridge and XMP files.
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Try running a search in the Support pages for "batis" and you should find this previous thread for a month or so back.
It may or may not help you but could save some time.
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"Anybody know of any tools that can extract all relevant metadata from the raw file and write it to the .xmp file?"
The documentation for EXIF Tool has an entire page on copying data from an image file to an XMP file.
The free tool BBEDIT will show the XMP structure inside an XMP file clearly, however it can't decode an IPTC digest.
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Thanks for the comments and interest in this topic. I did open the RAW image in Preview and the EXIF record correctly identifies the lens: Lens Model: SAMYANG AF 18mm F2.8. However, the EXIF metadata in Preview for JPGs converted from C1 attribute the image to Lens Model: Zeiss Batis 2.8/18, which is simply incorrect. Aside from the misattribution, I would surmise that the C1 profile for the Batis is not a perfect match for the Samyang. It is one thing to map a lens to a reasonable profile substitute for the purpose of PP (and give users the option to use it or not) and another to incorrectly label the lens used to capture an image, which becomes a persistent and very important bit of metadata about the image. I think the C1 designers and engineers should prioritize a fix for this issue in a future release.
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Eric,
I would suggest that you create a "Request" (i.e. a Support Case) and ask for some form of alteration.
The more people who raise the problem the more likely it is to be addressed.
So far, in the forum at least, there are just two of you who have raised concerns. (And also some suggestion in the other thread that that there may be some strange reasons for the apparent mis-attribution which, if correct, might make the "fix" something of a "special deviation from standards" and maybe not as desirable as might at first appear to be the case. )
ETA.
It may be worth pointing out that although there are some indications that some C1 support staff may browse this Forum form time to time it is NOT and interactive support channel for them and is still intended, so far as we know, to be a User to User communications channel.
Hence my suggestion to Submit a "Request".
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Yes, we don't know if C1 treats the posts in the Feature Requests topic in the forum the same way as a real submitted request, they are silent not only about the future, which one possibly can understand, but also about the present, which I at least cannot. No announcement nor explanation about anything regading this forum, feature requests postings, old C1 versions threads, just pure silence ...
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OK I submitted a support request. Not sure if that's the same as a feature request but my entry was framed as a request to correct this problem in a future release.
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Similar problem here:
On a Nikon D300s body, I had a Nikkor DX 18-200 VR. Was perfectly recognized and shown in the lens corrections.
I upgraded the lens to the Nikkor DX 18-300 f5,6 VR, and poof ... Although the lens is in the list, image correction never recognizes it (but file info shows it correctly). Go figure ...
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I am starting to wonder if C1 takes the Lens ID from the lens profile, and not from the EXIF fields.
If the manuacturer does not fully update the lens profile, then an incorrect Lens ID may retreived.
If anyone is interested, I can share my Applescript that list all the EXIF fields in a raw or jpg file. (that EXIFtool can retreive, tested on 10.14.6 but not 10.15)
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Had a similar problem with Fuji RAF files converted to DNG in Lightroom. The conversion did not maintain the lens description field exactly as it was written in the RAF file but truncated it. Capture One was then unable to recognise it and it had to be selected manually.
Dave
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