Body Elements

The EOS M is built around Canon's latest 'Hybrid CMOS' sensor, which has pixels dedicated to providing phase detection autofocus. It has a 1.6x 'crop factor', which means that an 18mm lens offers a similar angle of view to a 29mm lens on the 35mm 'full frame' format.

The EOS M accepts EF-M lenses directly, along with Canon's full range of EF and EF-S lenses via an adapter.
The top corner of the camera has an LED illuminator that assists autofocus in dark conditions, which can be disabled if you prefer. Below it is a receiver that's compatible with Canon's RC-series infrared remote control units.

Here you can also see the EOS M's proprietary strap connector.
The top of the camera has few controls - just the power button, shutter release and its concentric three position mode switch.
The gunmetal-finished hotshoe is placed on top of the camera in line with the centre of the lens. It's compatible with Canon's Speedlite EX series flash units, most notably the 90EX that will be included with the camera in some markets.
Also on the top plate is a pair of tiny, narrowly-spaced stereo microphones that provide sound during movie recording. It's also possible to plug-in an external stereo microphone to a socket on the camera's side.

The EOS M provides an impressive degree of control over sound recording - you get a volume control with left/right sound meters, and a wind cut-off filter.
The movie record button is placed on the camera's shoulder for easy operation by your thumb. It's somewhat exposed, but the chances of accidental activation are minimized by the fact that it's only active when the mode dial is set the movie position. In stills shooting modes it does nothing.
The main physical control point is this combined 4-way controller / dial. It offers direct access to drive mode, autoexposure lock, and exposure compensation; the Delete key re-centres the AF point by default, but can be customized to control other options including ISO sensitivity.

The central Q button activates the onscreen, touch-sensitive Quick Control display as seen on Canon's EOS SLRs.
Here's a close-up of the EOS M's strap connectors. The clasp on the strap attaches to the circular lug on the body and can rotate freely, allowing the camera to hang at whichever angle best-suits the lens attached.
The various connectors are on the left side of the camera under a plastic cover. From top to bottom, there's a stereo 3.5mm microphone jack, mini HDMI connector, and combined AV out/mini USM socket.

The EOS M is CEC-compatible, meaning you can control playback over HDMI using the remote control of many TVs.
The battery and SD card go into a compartment on the base of the camera. The EOS M uses a new battery, the 7.2V 825mAH LP-E12. It provides 230 shots per charge according to the CIPA standard.
The tripod socket is placed in-line with the centre of the lens. It's quite close to the base compartment door, so don't expect to be able to change card or battery with the camera on a full-size tripod.