> I’ve been looking at the official Canon options, but I’m a bit torn. Is the basic Mount Adapter EF-EOS R enough... I’ve also seen some third-party adapters from brands like Viltrox and Commlite for a fraction of the price... In my experience, when you're shooting weddings where you literally cannot afford a gear failure, you gotta play it safe. I totally get the temptation to save some cash, but I’ve tried many adapters over the years and honestly? The third-party stuff just doesn't cut it for pro work. I once used a Viltrox EF-R2 Mount Adapter and while it worked fine in my living room, it felt way too loose once I slapped my heavy zoom on it. Ngl, that wiggle is terrifying when you're moving fast during a ceremony. For your situation, I HIGHLY recommend just grabbing the Canon Mount Adapter EF-EOS R. It’s the most conservative choice, but it’s the only one that guarantees that weather sealing and rock-solid connection ur used to from the 5D days. If you really want to customize ur workflow, the Canon Control Ring Mount Adapter EF-EOS R is actually pretty cool for changing ISO, but it’s more of a luxury than a necessity. I mean, you’ve got thousands of dollars worth of glass like that Canon EF 70-200mm f/2.8L IS II USM and the Canon EF 50mm f/1.2L USM—dont risk it on a cheap Commlite EF-EOS R Mount Adapter. Stick to the OEM Canon stuff for the peace of mind. Anyway, hope that helps and gl with the new R6 II! It’s a beast of a camera. cheers!

Quick question - how often are you swapping lenses during a ceremony? I know the official ones were mentioned, but I've tested the Viltrox EF-R2 Control Ring Mount Adapter vs the Commlite CM-EF-EOS R Electronic Auto-Focus Lens Mount Adapter. The Viltrox ring is cool, but it has more wiggle with heavy glass like ur 70-200mm. The Commlite is a solid tank but lacks the dial. Is weather sealing a DEALBREAKER for you tho??

Sooo, if you want a budget-friendly pick that's still super solid, definitely check out the Meike MK-EFTR-A Auto-Focus Mount Adapter!! 1. It's way cheaper than the official options already mentioned and fits literally like a glove with no annoying wiggle.
2. Tbh, the AF is amazing for weddings, though you might lose some of that pro weather sealing. gl!

Just catching up on this thread... honestly, I’ve had some pretty disappointing experiences trying to save money on those third-party brands. I really wanted them to work, but unfortunately they just weren't as good as I expected once I put my heavy glass on. Having even a tiny bit of wiggle while you're trying to track a bride down the aisle is a total nightmare, and I've had issues with the connection dropping at the worst possible times. I'm gonna have to disagree with the budget approach here, even though I love a good deal. For professional work, you really should just stick with the Canon brand. You already spent the money for that R6II, so dont risk your shoot over a hundred bucks. Just get an official adapter from Canon and you wont have to stress about the weather sealing or the autofocus lagging. Its just not worth the headache imo. Let me know if you want to know how the balance feels with that 70-200!