Canon has officially unveiled its previously rumored mirrorless camera, the EOS M. The launch makes Canon the last of the large four manufacturers to use such a system, with Sony's NEX-C3, Nikon's J1 and V1, and Fujifilm's X-Pro 1 reaching the market earlier this year and late last year. Using an 18-megapixel CMOS (APS-C) sensor with the DIGIC 5 image processor, the EOS M appears to match many of the specifications the Rebel T4i uses, if not sharing the physical appearance.
