Viltrox EF-L Pro Lens Mount Adapter is an autofocus adapter allowing EF/EF-S lenses to be used on Leica/Panasonic/Sigma L-mount mirrorless camera models. The professional version features a positive-lock EF lens mount to avoid movement between the lens and the camera. It also supports IS lens stabilization, EXIF transmission, and electronic auto iris with an integrated Type-C upgrade port to enable its stronger compatibility with more new camera/lens models in the market. Achieve full lens performance the lens itself carries.
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Didn't fit my Canon EF lens, when I got it I got a list from them which lenses it supported. this should be on their website too.
Did some quick tests and can use my older EF-lenses without any problem.
Does it work with Leica SL
Using the adapter for my EF lenses on a Leica SL2S. Works fine, solid build.