Problems with EF 50mm f/1.2 L and Viltrox EF-EOS M2 0.71x adapter?

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davecheng Junior Member • Posts: 32
Problems with EF 50mm f/1.2 L and Viltrox EF-EOS M2 0.71x adapter?

Has anyone successfully used a Viltrox EF-EOS M2 0.71x reducer with a Canon EF 50mm f/1.2 L lens? On my M6 Mark II shooting stills, the AF hunts from near to infinity and never locks on. Shooting with MF works and the wide-open f/0.9 aperture is reported to the camera as f/1.0.

My EF-EOS M2 is running the latest 1.4 firmware. A related product, the EF-M2, looks like it was updated for compatibility with f/1.2 L primes with firmware 3.4 in November 2019.

I don't really want to have to spend four times the cost to get the Metabones adapter, but I might just have to if this Viltrox is a dead end.

Canon EF 50mm f/1.2L USM Canon EOS M6
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