As a photographer I can always recommend Canon. This is a great product and it really has only few downfalls to it.1. AF is very slow, so busy scenes are not for this product2. With adapter to use normal EF-S lenses the AF slows down even further3. EF-M lens availability is very limited, which brings you back to the point 2 above.But you get bang for your buck if you can live with the above. Digic 5 processor, touchscreen and the great Canon quality if you shoot more portraits, night scenes and landscapes in general. If you have few canon ef-s lenses you like and need cheap but great EOS experience on the road while not wanting to carry e.g. heavier 6D, 5D bodies... then this is great way to go!

I recently decided to make the switch from a Canon DSLR to a Canon R mirrorless. It was easy to learn since I'm already used to Canons. I bought the EF to RF adapter (with the adjustable ring) so I could use my DSLR lenses with it. My only complaint is that Canon should give you the adapter free (they used to!) when you buy the camera. So far, it's taking good photos, and I decided to buy the kit lens that goes with the camera, so I can use it for all-around use when I'm out and about. I have a very nice Sigma macro lens that I bought at the same time, which needs the EF to RF adapter, but it takes very nice macros on this camera. I'm glad I bought it.

So you finally decided on getting the EOS M (it's flaws considered). I assume you are a canon user, have a couple of good (canon EF/EF-S mount) lens lying around and would like to be able to use those on you EOS M. Just like me, you love your canon dslr but sometimes wish you can travel light but still be able to enjoy the canon ecosystem that you have grown to love. If you are what I assume you are, get this lens adapter.I took a gamble and bought a "like-new" used from a seller at Amazon and was very happy with a purchase. For anything more than $150 I probably would think twice. But I am not taking a start out because of the price. This adapter handles every canon mount lens I threw at it. The build quality is nice. The design (the way it attaches to the eos m; the included, detachable tripod mount) is well thought of... just perfect.

Canon EOS M Mount adapter is a must have for all Canon EOS M users if they have other Canon EF and EF-S lenses. The construction is solid and heavy. I used several Canon EF-S and EF lenses and they work fine with the adapter. Highly recommended.

EOS-Rで使用。純正Canon以外含むEE レンズ３本とEF-Sレンズ７本、普通に使えました。EF-SレンズのクロップはCanon製は自動で、シグマのArt 30mm F1.4 DC HSM、シグマの17-50mm F2.8 EX DC OS HSMも自動、タムロンの16-300mm(B016E)とトキナーのAT-X 11-20mm F2.8 PRO DXは手動で設定が必要でした。EOS-Rは80Dからの買い替えですが、どのレンズもAFの速さは変わりないです。正直なところダメ元で買いましたが手持ちレンズ全てが動作し、嬉しい誤算です。質感も約７千円の値段を考慮すれば十分です。KenkoのTELEPLUS HD C-AF 2X DGX との組み合わせはレンズによってエラーが出て作動しませんでした。使える場合でも流石にAFは遅くなります。

It's an adapter - it allows me to put my EF glass on my EOS-M and they are fully functional when mounted. AF, Metering, aperture control - all good. Made of metal and I appreciate the tripod mount on it - handles my 70-200 f2.8 IS II without a problem although it looks pretty much like a rear lens cap when setup that way :)

My experience with Canon has been with the T3i, T6, 7dmk2 and 6dmk2. Each of these cameras were good in their own ways, but were not perfect. IQ was my biggest complaint, especially in low light.The R6 definitely has better IQ than these previous cameras and performs much better under low light conditions. The eye focus feature is helpful but takes some practice to learn. The images I get with my R6 compared to my 6dmk2 are noticeably sharper and show better tones overall.I am currently using only EF lenses on my R6 thanks to Canon's brilliant adapter! All my EF lenses work flawlessly on my E6 thanks to Canon's adapter. I'm waiting for Canon to release more primes in the near future to keep my R6 kit lightweight.As for the negatives, I'm not a fan of electronic viewfinders. Nothing beats the optical viewfinders of Canon's older dslr's. Also, a top lcd display would have been nice, but it's not a dealbreaker for me.Overall, I highly recommend the R6, especially if you own multiple EF lenses (just remember to purchase the adapter).

Adapter works great, it lets me attach my EF and EF-S lenses to my Canon EOS M without any issues.