Re: SHOTEN focus confirmation adapter for Leica M to Canon RF
I received mine today. Here are my impressions just from use in the house with a bunch of my M mount lenses on the R5II in manual exposure, manual ISO:
The mounting feel/action could be better. There is unexpected resistance but nothing binds/locks, so far.
Generally no problems with any of my lenses, whether current Leica M, vintage Leica, Leica R, LLL, Voigtlander, Canon/Nikon/Zeiss LTM, etc.
The focus assist feature generally worked across most of the frame but I did find that it's maybe 80% coverage with some lenses. For example the camera seemed more picky when the VM 15/4.5 v3 was used.
Focus assist turns green for a longer part of the focus through the more the lens is stopped down. I guess this would make sense as DOF increases and the plane of good focus appears to be deeper. But even at f/1.4 with, for example, the 50 Lux ASPH, I thought the camera's choice of correct focus was sometimes slightly off compared to magnified focusing. But most of the time the difference probably wouldn't be noticeable in real world situations.
I found it helped improve focus precision by using the single spot focusing point rather than any of the larger focusing points.
Face/eye subject detection worked but I need to play around with settings to get it to float more freely around the image.
Focus point can be moved wherever in the image for capture, but playback aways goes to the center of the image.
I kind of don't like the need to turn off the camera after picking a new lens from the list, but after a bit of practice, the process is fairly fast. I change lenses a lot and expect this will annoy me somewhat.
I also made a new custom LENS-PAR.TXT file using Text Edit on my Mac and it loaded correctly to the adapter and a couple test shots with one of the settings showed that the new lens name appeared correctly in EXIF, along with focal length, etc.
Mar 05, 2026 at 12:39 AM
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