#AF Lock

AF Lock (Autofocus Lock) is an advanced function on professional and semi-professional cameras that allows the photographer to lock or stop autofocus at any time. This also allows them to capture a picture at any time, even if the camera has not confirmed that the subject is in-focus. On some Nikon cameras, this button is labeled "AF-L" or "AF-L/AE-L". On Some Canon cameras, this function can be programmed to the "*" button (asterisk / star button) or one of the adjacent buttons.