Canon EOS-1D C EOS 1D X Instruction Manual - Page 176

a: Manual Exposure 5 Set the exposure. Check the exposure level and set the desired shutter speed and aperture. If the difference with the standard exposure exceeds ±3 stops, the end of the exposure level indicator will display < > or < >. 6 Take the picture. If ISO Auto is set, the ISO speed setting will change to obtain a standard exposure given the shutter speed and aperture set. Therefore, you may not obtain the desired exposure effect. In [z2: Auto Lighting Optimizer], if the checkmark for [Disable during man expo] is removed, it can be set in the mode (p.150). 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) compared to when you pressed the button. 176