Canon EOS M boasts a new 31-point Hybrid AF system, the camera provides a combination of contrast detection AF. The idea behind this is to enhance AF speed and accuracy, whit the phase-detection AF being used initially before the contrast detect system takes over to fine-tune focusing. The key advantage is enables continuous focusing when recording HD video, a feature that Canon DSLRs have lacked in the past, but have begun to offer with the most recent EOS Rebel T4i.
The EOS M has been made to be fully compatible with the full range of digital EX speedlite units. Additonally, an optional EF-EOS M mount adaptor will allow owners of the EOS M to attach any EF-S or EF lenses that they may already own.