I went for this one for my new Canon EOS RP since Canon's own is sold out. Works well. Works as it should.

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).

Bought this lens for my Canon EOS haven't taken any pictures with it yet

I use the tripod most of the time for Canon EOS 5DS R camera.

In my opinion, if you go for the Canon EOS M, you really ought to own both lenses as there are only two native lenses out. While I contemplated buying a lens adapter for the bigger and bulkier pro-style lense, I'm quite pleased with the mix of the 18-55mm and this 22mm. Great at capturing pictures in low light, and the pancake lens with your EOS M really makes it a truly portable DSLR level shooter.

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.

For my Powerseeker 70az was looking for a TAdoper and T-Ring to go with my Canon EOS D-600. Enquirers with camera accessory dealers turned out to be non-productive. Decided to try this. and it works like magic. You would need a TAdaptor to go with this. I would say a must have accessory if you are a nightwatcher and own a DSLR