Nikon D750 Kit Owner's Manual

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To choose an AF-area mode, press the AF-mode button and 
rotate the sub-command dial until the desired mode is displayed 
in the monitor.

D

Use an AF-S lens. The desired results may not be achieved with other 
lenses or teleconverters. Note that in live view, autofocus is slower and 
the monitor may brighten or darken while the camera focuses. The 
focus point may sometimes be displayed in green when the camera is 
unable to focus. The camera may be unable to focus in the following 
situations:
• The subject contains lines parallel to the long edge of the frame
• The subject lacks contrast
• The subject in the focus point contains areas of sharply contrasting 

brightness, or includes spot lighting or a neon sign or other light 
source that changes in brightness

• Flicker or banding appears under fluorescent, mercury-vapor, 

sodium-vapor, or similar lighting

• A cross (star) filter or other special filter is used
• The subject appears smaller than the focus point
• The subject is dominated by regular geometric patterns (e.g., blinds 

or a row of windows in a skyscraper)

• The subject is moving