This isn't my first EF to EF-M lens adapter. The build quality of this one is definitely better than my older one and the auto-focus is great and speedy. You can remove the bottom bracket that connects to tripods which is usually an annoyance for me but I can see some using that piece.

My only issue with this adapter (which might not even be an issue) is that it's a bit tight on the lenses. When I connect it to my camera, it's fine, but when I attach a lens to it, I can hear almost a 'grinding' noise. That might just be the connection prongs on the adapter itself, however I don't hear that same noise on my previous adapter which makes me believe it's a little on the tight side when connecting a lens. Overall, I'm satisfied with this brand's adapter and have bought several lens filters K&F as well.

This adapter works great with the collection of Canon EF lenses that I have to an EF-M mount body. The cheap adapters I have tried does not do AF, but this is not one of them. This adapter has got full AF support with most lenses I tried with which is only a few that I have in hand. The build quality is excellent and it comes with the mount to go straight into the tripod if mounting a heavy lens to balance out the weight. It came with an allen wrench for the mount screws. I wish this came in a ready to carry pouch or case so the adapter and wrench can stay together.

Pros:
- Very well built adapter.
- Supports AF.
- Metal mounts on both ends and mostly light weight metal body.
- Tripod mount holes right on the adapter that also supports heavy lens mounting. Comes with the allen wrench.
- Very nice packaging with foam padding inside.

Cons:
- Could have provided a case to carry the adapter and the wrench.

My experience with this EF to EF/EOS M Adapter has been nothing short of great. Despite its reasonable price, it performs exceptionally well, especially when compared to other off-brand adapters. Interestingly, I have noticed that this adapter has made my autofocus function faster than before. I had not expected this, but it has been a pleasant surprise. Additionally, although I initially did not take the Image Stabilization feature seriously, I have been impressed with how well it performs.

It provides a high level of stability, which has helped me take clear and sharp photos in various settings. I have used this adapter in multiple settings, including weddings, headshots, and family portraits, and the results have been nothing short of great. With its exceptional ease of use, I have been able to capture quick moments with stunning clarity and detail. Even in a super low-light indoor setting, I managed to take great photos without using any flash.

The adapter is of good build quality and feels sturdy when I hold it. I have been using it to mount my EF lenses to my Canon EOS M camera, and it has been a game-changer for me. The adapter’s compatibility has allowed me to use my existing lenses with my new camera. The adapter fits both the camera and lens securely, and I never have to worry about any looseness or instability while using it. I can confidently say that this adapter has added a new dimension to my photography experience.

I have not noticed any loss in the quality of my photos while using both macro and telephoto ranges. The image stabilizer and autofocus features worked flawlessly. The adapter is equipped with metal fasteners for both the camera and lens sides and has gold-plated contacts. Additionally, the adapter allows me to attach my tripod to it, which helps to balance the weight of my super-telephoto lens if I wish to use that.

In summary, this is an excellent method to make the most of a range of EF lenses without breaking the bank. Since I started using this approach, I have been able to use my preferred lenses with my EOS M camera, which has significantly broadened the use of my DSLR. I highly recommend it.

Hope this review helps someone out.

Seems very solid, autofocus works quickly and reliably on my XT30ii with Sigma 18-35. I can recommend it - especially for the price.

I’m very pleased to see the quality in kf. Compared to Neewer things are a bit more tight and neat . Materials more premium.

Highly recommend for the price

The adapter includes electronic contacts for aperture control thereby facilitating smoother usage of the adapter. The adapter is for mounting the EF lenses on the Cannon ESO M system i.e., the mirrorless camera system. A mount (released by loosening the hex head screw) with a 1/4" screw hole is included and can be used to directly mount this to the tripod. A hex key is also included. The adapter has a quick-release metal tab for releasing the lens.

also works with the older Tamron zoom.

Betrayed by the age and weight of the bodies and lenses, I bought a lighter and more modern Sony body. The Canon 28-105 USM was a faithful companion, so I can keep it thanks to this adaptor ring.

Saved me from buying expensive lenses.

It fit perfectly and worked flawlessly for my trip to Italy for a month.
I would buy from this manufacturer again given the quality and versatility with my automatic lens features without doing much research for competitors.

Works great with my sigma lens