For your situation, if you wanna save some cash, here's what I recommend: • Viltrox EF-R2 Mount Adapter (~$55): A decent option to get that control ring functionality for way less than official glass.
• Meike MK-EFTR-C Drop-in Filter Mount Adapter (~$140): Honestly a steal for video. It includes the VND for about a 3rd of the price of others. AF works well on both, so you dont sacrifice speed. For high-stakes gigs, Meike feels more robust. gl!

For your situation, I’ve been looking into the technical side of this since I’m also transitioning my kit. While the Canon versions are the standard, here is what I’ve found from some deeper research: - Be careful with weather sealing. A lot of the cheaper third-party options, like the Viltrox EF-R2 Mount Adapter, don't have the same high-quality rubber gaskets. If ur doing a pro gig in the rain, that might actually fry your R6... not worth it!
- Internal light leaks are a thing too. Some users mentioned that the Commlite CM-EF-EOS R Mount Adapter can have some reflection issues inside the barrel which kills your contrast in bright light. Honestly, I'm still figuring this stuff out myself, but for professional work, I’d be super cautious about saving a few bucks here. Stick with the Canon gear mentioned before tbh!!

yo, congrats on the R6!! seriously such a beast for pro work. for your situation, i'd say stick to the official canon stuff for high-stakes gigs. ive tried a few third-party adapters and ngl, they kinda felt a bit "loose" and the AF occasionally stuttered in low light. heres the breakdown:
- Canon Mount Adapter EF-EOS R (Basic): super reliable, no-frills, works perfectly.
- Canon Control Ring Mount Adapter EF-EOS R: actually amazing for stills cuz you can map ISO or aperture to the ring.
- Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter A: literally a life-changer for video. no more messing with screw-on filters! tbh, if you’re doing video, the drop-in ND is worth every penny. if its just photography, the control ring one makes EF glass feel like native RF glass. good luck with the shoots!!

Like someone mentioned, the official Canon adapters are the gold standard for high-stakes work, but I've found some decent alternatives that work just as well if you're careful. I've been using the Commlite CM-EF-EOS R Mount Adapter for a while now. It's usually under $60 and honestly, the AF speed is basically identical to the native one. From a DIY standpoint, I always make sure to check the tension springs and screws on these third-party units before a shoot. Sometimes you can give the mounting screws a tiny turn with a precision kit to make sure there's zero play when you're hanging a heavy L-lens off the front... helps avoid that loose feeling some people complain about. If you're looking for something that feels a bit more robust than the cheaper plastic ones, the FotodioX Pro Lens Mount Adapter EF to RF is a solid choice. It's all metal and feels very secure. It wont give you the control ring, but for a standard professional setup where you just need the lens to stay put, it's a very reliable piece of gear.

👆 this

Would love to know this too

Re: "Like someone mentioned, the official Canon adapters are..." - it really feels like the consensus here is that for pro work, you just cant beat the official Canon units for peace of mind, even if the Meike or Viltrox options are fantastic for the price. Reliability is everything when you are on a clock! Honestly, talking about these adapters makes me so nostalgic for when I first started building my kit. I remember taking my gear on this massive solo road trip through the Southwest a few years back. I was so paranoid about my lenses that I kept them in this padded cooler because I thought the desert heat would melt the coatings or something crazy lol. I ended up staying at this tiny motel in Moab that had the most amazing neon sign I have ever seen. I spent like three hours trying to get the perfect long exposure of it while the owner just sat there on a lawn chair watching me like I was a total weirdo. Best taco truck in the world was right across the street though... seriously, their carnitas were life-changing. Anyway lol sorry kinda went off topic there.