It's more expensive to get one of these (with the 22mm pancake and the EF adapter...$1000) than the superior Rebel T4i (with its kit) at $930 if you want EF lens support.
What does this buy you over the Rebel, sizewise? Nothing. The Rebel has an articulated screen, a viewfinder for sunny days, 9 cross-type AF points, better balance weight and grip for bigger EF lenses, no need for a lens mount adpater, and not much harder to place in a camera bag (as the EOS M will need since it does not fit into a pocket).[...]
Good point - I wanted to have a compact mirrorless which is compatible with my EF(-S) lenses including the shorty 40. The most important dimension to stow away a camera is camera THICKNESS - so the 22mm lens is essential. The most important reason to buy a mirrorless is to have a 2nd or 3rd camera attached to my EF(-S) lenses. So I have to buy the bulky adaptor with tripod mount. That's the 1000$/EUR - a T4i costs 750-800EUR in germany and is available.
Thickness of the EOS M + Adaptor + shorty forty: roughly 80mm
Thickness of the 650D (or EOS40D) + shorty forty: roughly 85mm
After viewing a video about the use of the EOS M via the touch screen:
Direct controls are really really more ergonomic than fumbling with
symbols on a screen which should also act as viewfinder.
- EOS M is not substantially flatter with EF lenses than a 650D (or 40D, or 5Dxyz)
- direct controls are preferred
- built in flash in 650D is a welcome feature if it is used as all-day-with-me camera
- flexible screen is welcome for video - the main reason for me to ad a new camera to my
Hopefully the next mirrorless has an EF mount and a cube shaped design like the rolleiflex
cameras with two displays (on top and on the back) which can be swapped to act
as finder and control panel ... that would be a clean solution and make it compact enough
to stow it in a lens bag
... the camera shurely with FF sensor