Nikon D780 DSLR Camera (Body Only) - Manual (Page 131)

85 Camera Controls
A Locking Focus When AF-S Is Selected for AF Mode
Focus will lock while the shutter-release button is pressed halfway. Focus
will also lock while the
A button is pressed.
A Using the Shutter-Release Button for Exposure Lock
If [ On (half press) ] is selected for Custom Setting c1 [ Shutter-release
button AE-L ], exposure will lock while the shutter-release button is
pressed halfway.
A Taking Multiple Shots at the Same Focus Distance
• Focus will remain locked if you keep the A button pressed between
shots, allowing several photographs in succession to be taken at the
same focus setting.
• Focus will also remain locked if you keep the shutter-release button
pressed halfway between shots.