Canon EOS 5D Mark III EOS 5D Mark III Instruction Manual - Page 167

q Selecting the Metering ModeN In [z2: Auto Lighting Optimizer], if the checkmark for [Disable during man expo] is removed, it can be set in the mode (p.142). When ISO Auto is set, you can press the button to lock the ISO speed. After recomposing the picture, you can see the exposure level difference on the exposure level indicator (p.22, 23) compared to when you pressed the button. q Selecting the Metering ModeN You can select one of four methods to measure the subject brightness. The metering mode is set automatically to evaluative metering in the mode. 1 Press the button. (9) 2 Select the metering mode. While looking at the LCD panel, turn the dial. q: Evaluative metering w: Partial metering r: Spot metering e: Center-weighted average metering q Evaluative metering This is a general-purpose metering mode suited even for backlit subjects. The camera sets the exposure automatically to suit the scene. w Partial metering Effective when the background is much brighter than the subject due to backlighting, etc. Partial metering covers approx. 6.2% of the viewfinder area at the center. 167