キヤノン コントロールリングマウントアダプター EF-EOS R

The control ring adds a nice tactile option for adjusting aperture or exposure while shooting, and build quality feels solid just like my other Canon gear. Autofocus on my old EF lenses is just as snappy as it was on my DSLR, which was my main concern.

I was worried about losing autofocus speed with my older EF lenses on the new mirrorless body, but this adapter locks on just as fast as native RF glass. The control ring adds a nice tactile dial for quickly adjusting aperture without taking my eye off the viewfinder.

The control ring is the standout here—it lets me tweak exposure or focus without ever taking my eye from the viewfinder, which feels incredibly natural. Everything snaps on tight with no wobble, and my older glass behaves exactly like it should on the R body. Solid build, zero regrets.