Nikon D810 Product Manual - Page 332

a3: Focus Tracking with Lock-On G button ➜ A Custom Settings menu This option controls how autofocus adjusts to sudden large changes in the distance to the subject when AF-C (0 87) is selected during viewfinder photography. Option Description C 5 (Long) When the distance to the subject changes abruptly, the (4 camera waits for the specified period before adjusting D 3 (Normal) the distance to the subject. This prevents the camera from refocusing when the subject is briefly obscured by )2 objects passing through the frame. Note that 2, 1 (Short), and Off are equivalent to 3 (Normal) when E 1 (Short) 3D-tracking or auto-area AF is selected for AF-area mode. The camera immediately adjusts focus when the Off distance to the subject changes. Use when photographing a series of subjects at varying distances in quick succession. a4: AF Activation G button ➜ A Custom Settings menu If Shutter/AF-ON is selected, both the shutter-release button and the B button can be used to initiate autofocus. Select AF-ON only to prevent the camera focusing when the shutterrelease button is pressed halfway. 308