ABSTRACT
On most EOS-1 bodies, the second power switch only powers the audible signal. On the EOS-1 bodies prior to the 1D Mark III, there is an additional switch, the Quick Control Dial Switch, located in 11 o’clock position just above and to the left of the Quick Control Dial. You may make exposure and vertical focus point adjustments only when this switch is active, however even when turned off , the Quick Control Dial will work for scrolling through the menu or moving around within an enlarged image you are reviewing (FIG 4.2).
