I am reviewing a series of photos I took with a Canon 20D about 20 years ago. I noticed that Photolab is reporting a different lens for several photos (EF 400mm F2.8 vs EF 400mm F5.6). I also have a lot of photos with no lens identified, just the caption “560mm f/O”.
I think most of these have been taken with the 400mm f5.6 using the 1.4x teleconverter. Should I worry about incorrect optical corrections being applied? Is there anything I can do to change the lens for PhotoLab?
Probably different lens-id’s in the file.
George
A combination of old Canons with new lenses can lead to missing or “strange” lens information. I had this situation with my EOS 5D and lenses like the 24mm f/1.4 MkII.
Firmware updates have corrected some of the issues, but not all.
I initially “fixed” the issue by tweaking lens information of file copies with ExifTool, later with editing the respective table of the PhotoLab module database. No need for such hacks now, PhotoLab has updated lens detection and all of my cam/lens conbos work as expected.
PhotoLab reads more than one lens information tag. This means that lens information often needs editing of more than one tag.
You shouldn’t be worried…but DPL can select the wrong module or no module at all. I’d check for differences in looks if you apply/don’t apply a module and I’d not expect to see much difference. Canon teles and specially the primes tend to be good and modul corrections don’t change much in these cases. Maybe you’re better off without module - better than using the wrong one!