Review on Fotodiox Pro Lens Mount Adapter With Auto-Exposure, Auto-Focus And Auto-Aperture, Canon EOS EF EFs Lens To EOS M EF-M Camera Body by Patrick Ross

When I purchased this item, it had just appeared on Ebay, and there were no customer reviews. But I have been buying Fotodiox products for years, and their quality is consistently excellent. I had been looking at the Canon EOS M Mount Adapter and a couple of other brands, but when I saw the Fotodiox Pro Lens Mount Adapter at less than half the cost of the Canon, it was a no-brainer--go with Fotodiox. With this affordable adapter, my new EOS M camera should become the most versatile tool in my kit!Then before the shipment arrived, two customer reviews were posted here, reporting that the device does not communicate complete information between lens and camera and is unusable with IS and manual focus lenses.My bad. I should have checked the specs. I immediately ordered the Canon adapter, planning to return the Fotodiox. But when the Fotodiox arrived, I thought, wait a minute--I haven't even given it a try. What's it gonna hurt?Well, gosh, the Fotodiox DOES work with my IS lenses-- Canon EF 28-135mm f/3.5-5.6 IS USM and Sigma 17-50mm f/2.8 EX DC OS HSM . I tested both lenses with IS switched on and off (don't have any non-autofocus lenses, but I've tested manual focus on these lenses, and it works). It also works with my Canon EF-S 60mm f/2.8 Macro USM .So, autofocus is spot-on, and image stabilization definitely works with this adapter. (Not only is this noticeable in clearer pictures, but I also can hear the stabilizers working.) Aperture and shutter speed info are displayed on the camera's LCD, and if I get an exposure wrong, there are the usual flashing red warnings--which CAN be overridden if I choose. Exactly as if the lens were directly attached to the camera. I don't see how the Canon brand adapter could work any better.There is a lot of chatter in photography forums about how slow EOS M autofocus is, esepcially with EF lenses attached. I was concerned about that because I LOVE my EF 28-135. And it's true; the autofocus is slower than the 22mm pancake--but not as clunky as I was expecting. AF with the Sigma, on the other hand, seems to be about the same as the 22mm pancake.The Fotodiox adapter is made of very well-machined metal, and the finish is excellent. No wobbling, rattling or play anywhere. Lenses seat smoothly in the adapter and click solidly into place. With the adapter + lens assembly attached to my camera, it feels like one seamless piece of equipment.My adapter did not include front/rear caps, but an EF-M cap and a EF or EF-S lens cap should work with it just fine. They're just lying there in the bag, anyway.I give it a five-star endorsement, no questions!