309UThis option controls how autofocus adjusts to sudden largechanges in the distance to the subject when AF-C is selected duringviewfinder photography (0 97).If Shutter/AF-ON is selected, both theshutter-release button and the B buttoncan be used to initiate autofocus. If AF-ONonly is selected, autofocus is only initiatedwhen the B button is pressed.a3: Focus Tracking with Lock-On G button ➜ A Custom Settings menuOption DescriptionC 5 (Long) When the distance to the subject changes abruptly, thecamera waits for the specified period before adjustingthe distance to the subject. This prevents the camerafrom refocusing when the subject is briefly obscured byobjects passing through the frame.( 4D 3 (Normal)) 2E 1 (Short)OffThe camera immediately adjusts focus when thedistance to the subject changes. Use whenphotographing a series of subjects at varying distancesin quick succession.a4: AF Activation G button ➜ A Custom Settings menu
