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.

If you have an M mount camera, this adapter lets you use the hundreds of Canon lens models made since the late 1980's, many very reasonably priced. The Canon adapter maintains the quick focus of the camera, and was selling at a steep discount on Amazon.

Extremely pleased with this lens for video and photos. I am using a Canon RP so I have to use an adapter but I am having no issues at all.

I'm coming from having used Canon EOS D series for a decade, so I've been looking for some useful lens to add to my iPhone. I find it that I've been using my iPhone X for photography way more these days. This is a very nice, compact, easy to carry/use set. I particular LOVE the small LED clip-on light as it gives me the illusion of using my Canon Speedlight flash, turning it around wherever I like depending on the mood and the purpose of the photo. The Wide-angle lens produces very good quality photos, and it's ideal for situations where you want to fit-in more people or objects, but you literally don't have room to move further back. The Macro lens also produces good photos. The only issue I have with it is that I wish it had a tiny focus ring around it; it takes too long to bring the object into focus, and this is a thumbs-down for me. I cannot spend more than 1-2 minutes just to take a photo because the moment passes! Overall, excellent product to carry around as an accessory for your iPhone. I also have a standard leather case on my iPhone X, and I'm happy to report that the lens clip-on and the LED light clip-on work great.

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.

I am using this lens for Canon M50 Camera. You will need EOS adapter. I have attached 3 photos taken with this lens.

Won’t work with my two canon camera’s. Works with Iphone with the adapter.

I purchased a Canon FD to Leica M adapter in order to get some more use out of my 17mm Canon lens. I’m pretty impressed with it so far. It seems considerably better quality than the cheap imported adapters, and not as expensive as a Novoflex. The lens hooks up solid and it feels solid on the camera body. I will most likely try some of their other adapters as necessary.