I was wondering if anyone has been using Photolab 3 with the Sony A7RII (or other Sony body) and a Canon lens (with converter)?
There are lens modules available for the Sony A7RII and quite a few Canon lenses. I use the Canon 400DOII with 1.4TC or 2.0TC, and when processing a .tiff image generated by CO1 in Photolab 3, I was prompted that there was a lens module available for that image, taken with the Sony A7RII and Canon 400mmDOII+2.0TC.
I downloaded/installed the module and it was applied. But the original .ARW raw files ánd the .tiff files created in DxO Photolab do nót recognize the lens module.
I compared image lens metadata, and the lens as reported in the DxO raw and .tiff images, says “400mmf4”, whilst in the .tiff generated by CO1, it says “Canon EF400mm f/4 DO II USM with EF 2x III” which is the proper lens info.
To get DxO to recognize the lens, I can strip the Sony “maker notes” from the .tiff image (with exiftool), and add the CO1 lens info text in a “XMP-aux” field, just like CO1 appears to do. Somehow, DxO Photolab then uses that field to determine the lens used. But ónly if the Sony maker notes are stripped from the exif, if not, then the lens reads '400mm f4" again, and the module is not active. On a side note: I found that CO1 indeed strips the maker notes from the image when generating a .tiff image, but DxO keeps the maker notes when generating a .tiff image.
But apart from that only being to determine what is going on (not a practical solution), that is not possible in a raw file, where the maker notes are neccessary and cannot be stripped.
To complicate things further, Adobe bridge reports the lens model on all three types of images (raw, CO1 .tiff and DxO .tiff) as “DT 400mm f4 SAM” which can also be found in the exif data with exiftool.
So to summarize: DxO knows the camera: Sony A7RII, knows the lens: 400mmf4, knows the focal length: 800mm, but cannot connect the lens module, perhaps because the Sony maker notes lens field omits “Canon” from the lens info, and DxO prioritizes the maker notes lens info above other exif fields?
I use the Sigma mc-11 as adapter. Has anyone gotten DXO to recognize the lens module for the images from Sony cameras with Canon lenses? The modules áre after all available for download on the DxO website.
edit: I found with exiftool, that the maker notes of the Sony A7RII dó in fact contain a “lenstype” field that says “Canon 400mm f/4 DO II USM + Canon EF adapter”. It does not specify either 1.4 or 2.0 adapter, but that can be read from the focal length I assume. So there should not be a real problem for DxO Photolab to recognize and apply the available lens module. So should this be reported as a bug?