Nikon D7100 Product Manual - Page 261
a6: Number of Focus Points, a7: Built-in AF-assist Illuminator, The AF-Assist Illuminator, See Also
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a6: Number of Focus Points G button ➜ A Custom Settings menu Choose the number of focus points available for manual focus-point selection. Option Description B 51 points Choose from the 51 focus points shown at right. A 11 points Choose from the 11 focus points shown at right. Use for quick focus-point selection. a7: Built-in AF-assist Illuminator G button ➜ A Custom Settings menu Choose whether the built-in AF-assist illuminator lights to assist the focus operation when lighting is poor. Option On Off Description The AF-assist illuminator lights when lighting is poor (viewfinder photography only). AF-assist illumination is only available when both of the following conditions are met: 1. AF-S is selected for autofocus mode (0 71) or single-servo autofocus is selected when the camera is in AF-A mode. 2. Auto-area AF is chosen for AF-area mode (0 73), or single-point or dynamic- area AF is chosen and the center focus point is selected. The AF-assist illuminator does not light to assist the focus operation. The camera may not be able to focus using autofocus when lighting is poor. A The AF-Assist Illuminator Remove lens hoods when using the AF-assist illuminator. A See Also For information on the shooting modes in which AF-assist is available, see page 321. See page 301 for restrictions on the lenses that can be used with AF assist. U 233