Good idea and concept, but its hard to judge this product when using it on the EOS-M with its horrible focus. You don't really lose any stops with you EF lenses. The IS does not seem to transfer over. The EF lenses do what they are told, but a continuous auto focus and generally undeveloped Hybrid APS-C sensor is not fluently compatible with the current EF-s and EF lenses. Video is horrible with the CON AF on. It.'s just not pretty. If you have EF L lenses, already have a dependable DSLR, and you love the EOS-m with cash burning in your pocket, I would say get it. If not, buy the other EF-M lens you dont have or the one coming out soon.You will be disappointed if you buy this and a EOS-M in one shot. Product is fine, the root problem is the M.

this is my second EF 50mm lens. My first one is has the plastic mount. This one is much quieter and auto focus faster

I was looking for a way to extend my reach beyond my 100-400L lens. I have an extender but I loose light using it. Thought of getting a Sigma 100-600 sport = kind of expensive and picture I didn't think it would be as sharp as my canon lenses, so I got this with adapter ( Vello brand) and slapped on my 100-400L canon lens. Well it's pretty darn sharp. Here is my insight. Wow 14fps = something will be in focus. It tracks very well. Maybe not as good as my 5D mark iv. Not all of the 14fps are in focus. Using it with a long lens works just fine and is not awkward. It's sort of like using the lens with no camera. You can not move the focus point without touching the screen. I can live with that because the weight of holding it up is on the left hand with the lens weight in it leaving your right hand available to touch the screen. With the 3 dials it is easy to change F-stops, Speed, and ISO along with the Q touch screen. It does struggle with low light, so mornings and fast birds in flight may be a challenging. I find iso 1200 about the limit without loose sharpness if you crop. For non cropped city or landscape high is fine. So far all of my 5 EF L lenses work just fine and my EF-s 60mm. So far they all work with focus bracketing. NO CR3 raw file support in lightroom is a pain. Pop up flash causes shadows when an EF or EF-s lens is used.UPDATE: I was not happy with the Vello. It was loose and cause my longer lenses to not focus and the loose connection caused other weird issues. Got the Canon lens converter and my 100-400 works like a charm. It focuses everytime and the focus is better and I swear the noise is much better. Wish I could post the macros I have been getting but for now Amazon doesn't have that feature. Found that my Canon 600EX-RT flash works with TTL and even Fast Shutter sync! So Macros are not awesome as the large flash does not get blocked by the Ef lenses!

This is a nice little prime lens. Sharp, but I had hoped it would focus fast like my EF prime lenses. Perhaps it is the EOS-M camera firmware, but still a bit slow.

I am going to keep it simple. Buy this camera! If you want more details, keep reading :)I was hesitant in buying this camera, my main camera is a 5DS R, but I needed something small and more flexible for travel and less formal photography outings. I wanted something that would play well with my EF lenses and I also didn't want to spend more than $1,000.00.I purchased at the same time the Fotodiox Pro EF lens mount adapter. It works flawless, so far, and all my EF lens work perfect!The EVF is one of the best I have seen! Being new to mirrorless cameras, it is so amazing to get a live preview of how pictures will turn out! I also like that I can now use the view finder when doing videos! The flip out touch screen is really great too - I set it so I can change the focus point by sliding my finger on it while holding my eye to the EVF.Speaking of focus, it has quick autofocus and tracks moving subjects very well. I had no issues when using the lens adapter and the adapted lens performed with no loss of performance. The kit lens works amazingly well and the picture quality is excellent.There are so many features packed into this little camera. Its does feel less solid than more expensive cameras and the 4k is held back. You have to ask yourself how important that is to you. Video is not my main thing so I don't mind. What is great though is that the dual pixel autofocus in 1080P mode works amazingly well and focus is probably more important than 4k for most folks these days.I also changed my menus to the classic Canon style as I am familiar with those from years of owning Canons. That goes a long ways to making the camera work for me.If you already have Canon lenses and you don't want to break the bank, this is an awesome camera to buy. I did not think I would like it this much but now I find myself using it all the time. When in doubt, always remember that some of the most beautiful and timeless photographs were taken with very basic old school film cameras. You can spend all day reading reviews and watching videos of people picking apart every last detail of a camera. Remember why you are buying a camera and just go out and take picutres!

A few years ago, Peng-Toh and I were talking about mirrorless cameras. At that time, I'd spent some time with the EPL-1. The EPL-1 did a good job of pretending to be a good camera: shutter speeds were fast, and previewed images looked sharp and beautiful. But once you imported the images into Lightroom, the results were ugly: you quickly discovered that most of the time, the focus was off, and while the images were sometimes usable, they were never ones you were proud to share. Even photos from point and shoots such as the S90 were better. The consensus between Peng-Toh and I was that Canon would enter the mirrorless market, and do it right.Canon did enter the mirrorless market a few years ago, in the form of the EOS M, but it did everything wrong. Apparently, auto-focus was awful, so much so that I didn't even consider the camera. Peng-Toh did buy one, but he was disappointed. The one thing that Canon did right, apparently, was that the image quality was superb, but that was apparently insufficient to overcome all the other flaws.Canon had an EOS M3 sale during the holidays (and it's still running today). At $430, it's not cheap (though in the same ballpark as say, the Sony A6000), but online reviews indicated that Canon had solved the autofocus issues with the camera. The photo community seems to think that Canon isn't serious about mirrorless, and to some extent they're right: there are only 4 dedicated EFM lenses, and the M3 doesn't sport any high end features such as in-body image-stabilization, and Canon doesn't have any full frame mirrorless cameras like Sony.Pit against that, however, is that for any long lens work, you might as well stick the full frame EF lenses on the camera. Sure, the lens is huge compared to the camera, and you could have shaved a couple of hundred grams off the lens if you weren't carrying so much glass, but when you have a long lens that weight difference is really lost in the noise. Furthermore, those full frame mirrorless Sony cameras are very expensive, and when you come down to the same price level of the EOS M3, you get cameras like the Sony A6000. Even a cursory glance at the sample images comparing the EOS M3 to the A6000 using the kit lens easily reveals that the combination of a Canon lens and the EOS M3 utterly destroys the Sony equivalent as far as image quality. And if you're knowledgeable, you won't be shooting with the kit lens!With that in mind, I took the plunge and got the EOS M3 for my wife on her birthday. Along with the body, I purchased the EF-M 22/f2 and the EOS M mount adapter. We also bought and returned the EFM 18-55mm zoom. The zoom was surprisingly nice, but it had a strange color cast that I didn't find appealing.When building a new system, my philosophy is where possible build it around primes that provide roughly a doubling of focal length. So paired with the EFM-22, I got out my ancient EF 50mm/1.8. The two lenses yield a full-frame equivalent of a 35mm lens and an 80mm lens, which nicely covers the "normal" range, with the 80mm providing a great portrait lens. The 50mm together with the EF mount weigh just 80g more than the zoom, but provide a 1.8 maximum aperture which lets you isolate a subject in its surroundings. If Canon had made a wide angle prime EF-M lens, I would have bought it as well, since that's what's missing.When the camera arrived, I was impressed by how small it was, especially with the 22mm prime attached. It was tiny, just a bit bigger than the Sony RX100. But what blew me away was that my wife tried the camera, and then declared that she wasn't going to shoot with just her phone again. The biggest feature for her was the NFC wireless transmittal of photos from the camera to her smartphone. She'd always hated having to use lightroom to extract photos from a camera: by contrast, photos that go into her smartphone are immediately available for sharing and posting onto social networks. And the quality difference was obvious: this clearly is a DSLR in a point and shoot body.The nice thing about the EOS M3 if you're already a Canon user is that all your existing accessories work with it. My flashes and my collection of EF lenses were immediately compatible. When you put that together with high quality primes, it blew away anything produced by anyone who owns a crappy 18-200mm zoom instead of a decent lens. To put it all together, we went to a physical store and picked up a Think Tank Mirroless Mover 25i (after trying a bunch of other bags). It fit a flash, a mini tripod, the charger, and various other accouterments for serious shooting. In practice, Xiaoqin mostly carried it around with just the 22mm/f2 attached. With a 24MP image output, even severe cropping still grants usable photo quality.In practice, the camera produces superlative images. Low light performance is impressive:The biggest flaw in the camera is that shot-to-shot times are slow in one-shot mode, and the 50mm tends to hunt a bit. (An upgrade to the latest and greatest 50mm STM would probably solve this problem) But by far the biggest benefit is that the camera's much likely to be traveled with than my ancient EOS 5D2. That alone made my wife decide to keep the camera instead of sending it back to Amazon.Since I'm not the primary user of this camera, don't expect any long term reviews from me. But if you're a Canon user looking for a travel setup (especially if you're a landscape person who needs a camera for backcountry camping or cycling), I won't hesitate to recommend this to you. The image quality is superb, it's small and light (it's smaller than even the G series of point and shoots), and a landscape shooter won't have any issues whatsoever with the shot-to-shot times. Canon might not have "done it right" yet, but for someone who's got 2 kids and would like to travel with a serious camera that's nevertheless still light enough to bring on a trip, the M3 is an great alternative to the DSLR and produces far better photos than even the Sony RX100.Recommended.

It is pretty helpful to mount any EF lens with my Canon M50 and there is no change in Auto focus and image stabilization which is too good...

I’ll try to remember to pitch a fit if this thing fails, but it works. Ef and ef-s lenses work. I tried the feature where the Eos R helps you focus a lens without auto focus, it works. It also does face detection. I only tried these on an ef lens though. I have to try with my Ef-s lens, but don’t intend on keeping them so never messed with them for long.