The sony alpha a55 digital slt is a revolutionary new ultra compact interchangeable lens camera that features translucent mirror technology to offer lightning quick and precise auto focus for both still photo and full hd movie shooting via either the finder or lcd monitor in combination with this technology the 162 megapixel exmor aps hd cmos sensor is capable of recording still photos at a rate of up to 10 frames per second as well as full 1920x1080i hd movies the sony alpha a55 digital