A9: built-in af-assist illuminator – Nikon D300s User Manual

Page 294

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268

U

Choose whether the built-in AF-assist
illuminator lights to assist the focus
operation when lighting is poor.

a9: Built-in AF-assist Illuminator

G

button ➜ A Custom Settings menu

Option

Description

On

The AF-assist illuminator lights when lighting is poor. AF-
assist illumination is only available when both of the
following conditions are met:
1. Single-servo autofocus is selected for focus mode (

0 74).

2. Auto-area AF is chosen for AF-area mode (

0 76), or single-

point or dynamic-area AF is chosen and the center focus
point is selected.

Off

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

The AF-assist illuminator has a range of about 0.5–3.0 m (1 ft. 8 in.–9 ft.
10 in.); when using the illuminator, use a lens with a focal length of 24–
200 mm and remove the lens hood.

A

See Also

See page 345 for restrictions on the lenses that can be used with AF
assist.

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