Nikon D3100 D3100 User's Manual - Page 160

Beep G button ➜ B setup menu If On is selected, a beep will sound when the camera focuses in single-servo AF (AF-S or when shooting stationary subjects in AF-A focus mode), when focus locks in live view, and while the release timer is counting down in self-timer mode (0 54, 55). The beep will not sound when Off is selected. In quiet shutter release mode (mode J; 0 5, 53), this option is not available and a beep will not sound when the camera focuses. The current setting is shown in the information display: 3 is displayed when the beep is on, 2 when it is off. Rangefinder G button ➜ B setup menu Choose On to use the exposure indicator to determine whether the camera is correctly focused in manual focus mode (0 62; note that this function is not available in shooting mode M, when the exposure indicator instead shows whether the subject is correctly exposed). Indicator Description Indicator Description Camera in focus. Focus point is slightly behind subject. Focus point is slightly in front of subject. Focus point is well behind subject. Focus point is well in front of subject. Camera can not determine correct focus. A Using the Electronic Rangefinder g The electronic rangefinder requires a lens with a maximum aperture of f/5.6 or faster. The desired results may not be achieved in situations in which the camera would be unable to focus using autofocus (0 56). The electronic rangefinder is not available during live view. 144