You asked
Can I adapt the canon ef 180mm f 3 5l macro usm to canon rf?
The site doesn't cover this one. The Canon EF 180mm f/3.5L Macro USM page lists only EF-mount Canon bodies, and I have no RF cameras listed for it, so I can't confirm it works on RF.
If you're thinking about an adapter, the Lenses page explains that mirrorless mounts are shallow, which makes adapting older manual-focus lenses easy. That's a general point, though, not a check for this lens. I also don't cover adapter models or whether autofocus carries over, so I'd check an adapter's compatibility notes before buying.
If you want this lens for macro work on a body I do cover, the EF-mount Canon bodies listed on its page are the safe bet. For a full-frame setup, the Canon EOS 5D Mark IV and Canon EOS 6D Mark II are both on the list.
Written by Claude from this site's pages.