Viltrox EF-L Pro AF Mount Adapter

Bought this to attach the Canon EF 100-400mm on to a Leica SL2-S. It worked! AF not as 100% as native but it worked 'very well' -- even in the 'O' position! I wish there is a list somewhere showing what lens are the 'O' lens. BTW, lens that are not 'O' means they should work with the 'A' setting.

It's my very first Viltrox product and I have heard most adaptors have one or many issues with automatic focusing across different brands and systems, but amazingly, this particular adaptor works perfectly between all of my old Canon L lenses on my brand new Panasonic Lumix S9, so I don't really have to look to purchase any Panasonic Lumix lenses for a long time... what a super deal! Here's a list of lenses I have tried: 10mm fisheye, 50mm 1.4, 16-35mm, 24-105mm, 70-200mm, 100mm macro, now the cheaper EF-S lenses did not work as well, so If you had a collection of higher quality lenses for your older Canon 5D and they should work perfectly as if they are made for the new Panasonic S9, I hope Viltrox has another adaptor for the Nikon EF-Z because that will be thousands saved on buying new lenses again on another new system. Thanks again Viltrox, truly amazing product!

Nickel

I've used other adapters and there was always a little bit of play with vintage lenses. This locking ef is a game changer for me.

I can't speak to the electronic pass through and auto focus performance, because that's not what I'm using it for. I was looking for a way to securly mount my old lenses, and I found it in this adapter.

My leica SL is died , totally cannot turn on after using EF L PRO VIltrox adapter