Meike MK-EFTR-C Drop-in Filter Mount Adapter for Canon EF to EOSR with Variable ND Filter and UV Filter for EOS R R5 R6 RP R5C C70 Cameras

It works great. The first one I had there was a little defect where the bayonet and barrel of the adapter had some play thus the lens wasn't always aligned with the sensor and the focus was soft and a bit of chromatic aberration and I was all "this thing is crap!" Then I discovered the adapter turned out to be defective and I got my replacement next day and I've taken it through all the tests and it works great. So if you aren't thrilled with it, perhaps you got a bad one.All functions on all lenses work well (I tested with Canon, Tamaron, Yongnuo, Sigma lenses 8MM to 400MM) and the focus speed, clarity and other performance is identical to using the lenses on my older EF camera without the adapter. I really LOVE the drop in filters (they have CPL as well) as I use many lenses and having one set of filters is great.I do a lot of bird/wildlife/astrophotography so I'm pushing the limits of what the camera/lens can do and it all performs as expected and very well. I would buy it again and recommend it as it's very affordable and performs great.

I was going back and forth on which adapter to get when I purchased my R6MII and was going back and forth between the OEM, cheapest, and this model. I decided that the addition of the filter was worth it and it was 100% the correct decision.I have a bunch of EF lenses and this design is both durable and protects the camera sensor. I also appreciate the variable ND filter and have been able to capture some great shots with lenses that I did not have a native filter for.Great buy.

This is a nice solution to having multiple filters when you have many sizes of lenses. Don't expect the highest end quality for this price, but these seem to work well.

After researching reviews of Canon EF to R mount adapters, I decided to give this Meike MK-EFTR-C VND Drop-In filter a shot. It's an amazing value compared to the Canon Drop-In filter. Build quality of the mount itself was nice, the filter holders had nice little rubber seals, and it functioned fine with my 3 lenses ... but it just wasn't for me. Your mileage may vary, but in order of importance, here's why I decided to stick with the standard Canon EF-R mount adapter:1. There was a small bubble in the clear and VND filters. I ordered another MK-EFTR-C, but it also had defects (albeit smaller). Possibly I was unlucky twice.2. The VND is very clever, but because it's 2 polarizers rotating relative to one another, by adding my normal circular polarizer to the front of my lens, I was able to shift the color of the image. This is a known issue.3. I was a bit concerned about introducing dust more easily onto my sensor when swapping filters (or if they weren't fully seated). When they're screwed onto the front of the lens, the sensor is still sealed.I'm not a professional photographer, so I may not notice the above potential issues, but the purest in me fell back onto the simple principal of the Canon EF-R mount adapter. It's just air (i.e., no potential lens influence) and sealed.

This adapter is Top quality! Works perfect with my R6 MII, Tamron 1.4 Tele & EF 100-400mm II setup. I want the RF 100-500mm lens, but this will help get me there. Handheld shot indoors 560mm, 1/50s, ISO 6400, F8. The filters are another big plus! If you don't see it here .... but more testing when my EF 2x II Tele comes this afternoon. If it doesn't auto focus really good, I will edit & ad that here.

Just picked up an canon r50 and needed an adapter to use with my old EF lenses. And I must say it is definitely worth the investment if you are in a budget. Fits kinda snug too. And easy to use. Highly recommend.

Great Adapter, works nicely with my EF lenses. Not perfect, but 1/3 the price of the Canon one. I found the filter to be good, no weird color shifts or strange shadows. I think the filter in the Canon one will be better, but I didn't try it. I'm happy.

I had purchased this item along with the drop in circular polarizer. The total price was about $590 less than the Canon equivalent. There have been no issues with this equipment and look forward to using my Canon EF and EF S lenses on my new Canon R6. I would say that the build quality is very good and I don't see any need to spend 3 times as much on original Canon equipment.