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Metz MECABLITZ 50 AF-1 digital Pentax Manual

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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 focu-
sing. 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 ran-
ge of approximately 6 m to 9 m (with a standard 1.7/50 mm lens). The maxi-
mum flash range is reached with the camera’s central AF sensor. Parallax error
between lens and AF measuring beam limits the close-up range with the AF
measuring beam to approximately 0.7 m to 1 m.
If the automatic AF measuring beam ቭ 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 automa-
tic 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 suffi-
cient for an exposure. When the camera shutter release is depressed, no flash
exposure 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
instructions).
☞
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 firmware version of the flash unit is shown in the display if the
mode button ባ is pressed while the camera is being switched on.
The flash unit’s firmware can be updated through the USB port
ቯ
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 „Mode“ 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.
☞
rES
☛
rES
5 Sek.
709 47 0191.A3 50AF-1 Pen. 17.12.2010 13:22 Uhr Seite 108
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