Recommended filters for Canon RF series wide angle lenses?

Totally agree! I've been comparing Hoya NXT Plus Circular Polarizer 77mm vs Breakthrough Photography X4 CPL 77mm. The X4's 3.1mm frame seems better for 14mm stuff... i think?? be careful with ur setup!!

This^ Also wanted to add that I'm totally with Reply #1 on this one!! Ngl, stacking filters on that 14-35mm is a total recipe for disaster. WARNING: You gotta be really careful about frame depth, even with "slim" filters. If the ring is even a tiny bit too chunky, you're gonna see those dark corners immediately at 14mm. It's super frustrating when that happens! - The drop-in adapter you mentioned only works for adapting EF glass, so it wont fit ur native RF lenses.
- Square 100mm systems are fantastic for avoiding vignetting, but they're way bulkier in the bag.
- Look for "ultra-slim" designs if you stay with screw-ons to avoid mechanical vignetting. Honestly, I've seen so many people ruin landscape shots because of a thick CPL... its reallyyy annoying!! Hope that helps, gl with the new glass!

Honestly, I started with the slim filters everyone mentions, but swapping them was a pain... 1. WARNING: dont buy different sizes for each lens! It's a huge waste of money when one large filter and cheap step-up rings do the job.
2. Respectfully, I'd consider another option—a magnetic system. 3. It's way faster and cheaper than the 100mm squares already suggested. Basically, I saved a ton of cash and it actually works at 14mm!! 👍

Adding my two cents here. Before you commit to a whole system, are you mostly doing long exposures with heavy NDs or just looking for a CPL to cut glare? That really changes whether a square system is worth the extra bulk and weight in your pack. I would suggest a few specific things to keep those corners clean at 14mm:

• Take a look at the NiSi V7 100mm Filter Holder Kit with True Color CPL. It has a specialized mount for the CPL that sits closer to the glass than standard screw-ons, which is huge for avoiding vignetting on that 14-35mm.
• Be careful with lens caps. A lot of the super slim filters dont have front threads, so your Canon cap wont stay on. I ended up getting a Kase Wolverine Magnetic Circular Filter Kit 77mm and the magnetic cap is way more secure than standard ones.
• If you want to stay with screw-ons, the Marumi EXUS Circular P.L Mark II 77mm is incredibly thin but still high quality. Just make sure to keep the threads clean so it doesnt get stuck. Honestly, the 16mm prime is so tiny that any 100mm system feels like overkill, but for the 14-35mm L, it is basically the only way to get zero shading at the widest setting. Let me know if you need more info on how they mount!

For your situation:
- Warning: dont stack filters!
- Why: it causes HUGE vignetting at 14mm. Slim rings work, but 100mm square is better... tho bulky. basically, keep it thin. gl!

Honestly, im always a bit paranoid about those thin threads seizing up on an expensive L-series lens. One DIY tip ive found helpful is using a tiny bit of graphite from a pencil on the filter threads - basically a cheap self-service way to prevent metal-on-metal sticking. It works well tho. Since youre worried about 14mm corners, i would actually look into the Kase Rear Lens Filter Kit for Canon RF. It requires a bit of a DIY approach to clip them onto the back of the lens, but it is the safest way to avoid vignetting entirely without carrying a massive system. Just be really careful and make sure youre in a dust-free environment when you do the swap!!!

• keep a Sensei Filter Wrench in your bag for emergencies
• check the rear element clearance before clicking anything in
• take your time with the install so you dont scratch the sensor

Same here!

Bump - same question here