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Autofocus flash operation in dim light
When the light is too dim for normal autofocus operation, the SB-600’s Wide-
Area AF-Assist Illuminator enables you to perform autofocus flash photography.
• In dim light, the Wide-Area AF-Assist Illuminator turns on automatically when the
camera’s shutter release button is lightly pressed, if an
AF lens is mounted and the camera’s focus mode is
set to S (Single Servo AF with focus priority), AF, or A.
• The effective shooting distance with the Wide-Area
AF-Assist Illuminator is approx. 1m to 10m (3.3 to
33 ft.) with a 50mm f/1.8 lens or less, depending on
the lens in use.
• Usable lens focal length: 24mm to 105mm (35 to
105mm for F-501/N2020 cameras).
• Use the center focus area in your camera’s viewfinder
when using the wide-area AF-Assist Illuminator
(for cameras not compatible with CLS).
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For cameras compatible with CLS
• The SB-600’s Wide-Area AF-Assist Illuminator supports the dynamic-area AF system of
cameras compatible with CLS.
•With a D2H camera, for example:
A total of 11 focus areas are usable at lens focal lengths of 35mm to 85mm as shown in
the figure below.
A total of 9 focus areas excluding the extreme right- and left-hand ones are usable at
lens focal lengths of 24mm to 85mm.
•With AF cameras such as the D2H, the effective shooting range of the wide-area
AF-assist Illuminator is approx. 1m to 10m (3.3 to 33 ft.) or less in the mid portion of the
frame, and 1m to 7m (3.3 to 23 ft.) or less at the periphery (with a 50mm f/1.8 lens).
These ranges may vary depending on the lens in use.
• For details, see your camera’s instruction manual.