Metz AF-1 User Manual download pdf (Page 76)

12 Automatic AF measuring beam

The automatic AF measuring beam



is activated in the flash unit by the camera

when the ambient lighting conditions become inadequate for automatic focusing.

It projects onto the subject a striped pattern that the camera can use to focus.

Depending on the camera’s activated AF sensor, the AF beam has a range of

approximately 6 m to 9 m (with a standard 1.7/50 mm lens). The maximum

flash range is reached with the camera’s central AF sensor. Parallax error bet-

ween lens and AF measuring beam limits the close-up range with the AF measu-

ring beam to approximately 0.7 m to 1 m.

If the automatic AF measuring beam  is to be activated by the camera,

the „single AF (S)“ autofocus mode must be set on the camera and the

flash unit must indicate flash readiness. Some camera models support

only the camera’s internal AF measuring beam. In this case, the automatic

AF measuring beam of the flash unit is not activated (as in the case of

compact cameras; see the camera’s operating instructions).

Low-speed zoom lenses can significantly curtail the range of the AF measuring

beam!

Some cameras support the AF measuring beam in the flash unit only with the

camera’s central AF sensor. If a peripheral AF sensor is selected, then the AF

measuring beam will not be activated in the flash unit!

13 Triggering control (auto-flash)

On some cameras the flash will not be fired when the prevailing light is sufficient

for an exposure. When the camera shutter release is depressed, no flash exposu-

re is triggered.

In various cameras the triggering control only works in the full program mode or

„P“ program or must be activated on the camera (see camera operating instruc-

tions).

☞

14 Care and maintenance

Remove dust and grime with a soft dry cloth or silicon-treated cloth. Do not use

cleaning agents as these may damage the plastic parts.

14.1 Firmware updates

The flash unit’s firmware can be updated through the USB port



and adjusted

to the technical requirements of future cameras (Firmware Update).

For more information, visit the Metz homepage at www.metz.de.

14.2 Reset

The flash unit can be reset to the factory settings when delivered. Press the

ìModeî button for ca. 5 seconds. After ca. 5 seconds „rES“ (= Reset) is shown in

the display and the flash unit is reset to the settings as delivered..

This will not affect the firmware updates for the flash unit.

14.3 Flash capacitor forming

The flash capacitor built into the flash unit undergoes physical change if the unit

is not switched on for a prolonged period. For this reason it is necessary to

switch the unit on for approximately 10 minutes at least once every three months.

The power supplied by the power source must be sufficient to cause the flash

readiness indicator to light up no more than one minute after the flash unit is

switched on.

☞

707 47 0065.A1-48AF-1O Inh. 17.09.2007 13:58 Uhr Seite 76

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Metz AF-1 User Manual Page 76

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