The Canon EOS 5D Mark II is a 21.1-megapixel full-frame CMOS digital single-lens reflex camera made by Canon, the first Canon EOS camera to have video recording capabilities. It succeeds the EOS 5D and was announced on 17 September 2008.

The 5D Mark II is the first camera in the EOS line to provide video recording functions.[8] Still photography during video recording is possible, but the camera suspends recording video until the final still frame is captured.

The Li-Ion battery for the 5D Mark II (LP-E6) has an 1800mAh capacity. Each battery contains a microchip with a unique identifier for reporting charge status and battery health for display on the camera. The 5D Mark II’s “Battery Info” screen can track battery health and shooting history for up to six LP-E6 batteries.

The camera has native ISO values of 100 multiplied by a power of 2; other ISO values are obtained by a digital exposure push (ISO values that are multiples of 125) or digital exposure pull (ISO values that are multiples of 160). The digital exposure push ISO is 1/3 stop greater than the native ISO, and a digital exposure pull ISO is 1/3 stop less than the native ISO.  The digital exposure push ISO settings produce more noise than the native settings with a reduced dynamic range, and the digital exposure pull ISO settings produce less noise than the native settings.  (Source: Wikipedia.com)