I read this comprehensive review before purchase and you should too:http://www.imaging-resource.com/PRODS/canon-eos-m/canon-eos-mA.HTMI'm an amatuer photog for more than 40 years. Until recently, my only concession to digital photography was the purchase of inexpensive Canon point-n-shoots. As film photography has become a greater burden and digital has caught up in terms of quality while surpassing in convenience and affordability, my discovery of this little gem at a bargain price was perfect timing. Adding a $15 adapter, I can use may ancient but excellent FD mount Canon lenses - think F1 and AE-1 cameras. Auto-focus speed doesn't matter to me because I still prefer to manually set almost everything. That said, the AF performance of the EOS M seems equivalent to that of my son's Nikon 1.My purchases for my entry into serious digital photography to date include: the EOS M with Speedlite 90EX and EOS M 18-55mm IS lense: an SD card (PNY 64 GB High Speed SDXC Class 10): a spare battery (Opteka LP-E12 LPE12 2000mAh Battery Pack): a lense adapter (Fotasy Canon FD Lens to EOS M Lens); and a neck strap (OP/TECH USA System Connector Super Pro A).

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.

This does what it's supposed to - connects the front of a Canon EOS to the rear of a T-adapter. High quality materials and slides right on and off.

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

This is a solidly constructed T-Ring that fits my EOS Rebel T1i perfectly. I use it for astrophotography using a T-Ring adapter for a 127mm Newtonian telescope and have had no issues.

I like how the AF of my EF lens attached to the Commlite AF adaptor EF-EOS R, is not affected. The camera and lens respond rapidly to capture moving subjects.The only thing I don’t like is that the lens feels a smidge loose in the adaptor, but it does not affect the image quality or how the camera responds (if that made sense)Overall very pleased with price for what you get.

As a Canon DSLR shooter this adapter is a must for owning the EOS M. It's really the only reason why I bought the EOS M. I love the 22mm f2 that comes with it, but being able to use my nearly $10k worth of lens on this makes it a steal. I believe without this adapter the camera is very limited. The adapter fits the camera and lens nicely. I personally feel that the lense attaching to the EOS M feels strange, tight compared to all my DSLRs, but this adapter and lens are snug once attached, and that's what matters.

Fits perfect to my Canon EOS 500D, I couple this T-Ring to a Celestron x2 Barlow T-Adapter, and have taken some excellent shots of the moon & night sky with my Celestron Astromaster 130eq. Very easy to use and a great price. I expected this to be plastic, but is metallic and very robust, precise threads allow quick & easy connection to my camera and T-Adapter. Highley recommended.