User's Manual

z Other functions

4 Autofocus flash operation in low light

In Commander and Repeating flash operations, if light is too low for

normal autofocus operation, the SU-800’s AF-Assist Illuminator comes

on, enabling you to perform autofocus flash photography. This is

activated by a signal from the camera.

• The AF-Assist Illuminator does not work in close-up flash operation.

• The SU-800’s AF-Assist Illuminator supports CLS-compatible cameras’ Multi-Area

Autofocus system.

The effective shooting distance with the AF-Assist Illuminator:

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

Activating and canceling the AF-Assist Illuminator

You can set the AF-Assist Illuminator to activate or

cancel even when receiving a signal from the camera.

Press the [MODE] + [W] buttons simultaneously for

approx. 2 seconds to toggle between the AF-ILL

(activated) and the NO AF-ILL (canceled).

Notes on using the AF-Assist Illuminator

• If the focus indicator does not appear in the camera’s viewfinder even through the

AF-Assist Illuminator is on, focus manually.

• The AF-Assist Illuminator will not light up if the camera’s autofocus is locked or the

SU-800’s ready-light does not come on.

• Refer to your camera user’s manual for more information.

READY

LOCK

MODE

NO AF-ILL

SEL