Profoto B2 250 AirTTL, Руководство пользователя

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B2 250 AirTTL
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Select ready signal
The current setting is shown in the Ready signal setting section [29]:
•
BEEP: The unit beeps when it is ready to flash again after recharging.
•
DIM: The modeling light is turned off after flashing, and is turned on when the unit is
ready to flash again.
•
DIM BEEP: The modeling light is turned off after flashing. The modeling light is turned
on and the unit beeps when it is ready to flash again.
•
Blank: No ready signal.
To select the ready signal setting, press the READY button [11].
The TEST button [4] is always turned off after flashing, and is illuminated when the B2 is
ready to flash again.
Turn on/off lamp head
To turn off the lamp head, press the corresponding MODEL button [9] or [12] for one
second. The lamp head’s light output setting [24] will show ‘- -’ when the lamp head is
turned off. To turn on the lamp head press the MODEL button once more.
Wrong exposure alarm
If a flash is released before the unit is ready, there will be a long beep and the display will
blink. These signals indicate that the flash light does not fully correspond to the set value.
The B2 will always flash even if the set light output cannot be met, as the image may still
be usable if the catch of the moment was perfect.
Note that the sound alarm only will be activated when the Ready signal is set to ‘BEEP’ or
‘DIM BEEP’.
Quick burst
Quick burst is an automatically activated function that allows a series (burst) of flashes to
be fired at a faster pace than the B2 can recharge, without losing light output. The function
is only active when the light output is set to less than full. The length of the burst, in number
of flashes, depends on the repetition rate and the set light output. The lower the light output
is set, the more bursts can be triggered. Thanks to this feature, the B2 can trigger several
flashes on lower power output without triggering the “Wrong exposure alarm”. Note that
the accuracy of the light output is slightly less precise when Quick burst is active. Quick
burst is indicated by blinking energy settings.
TTL
Profoto B2 can automatically set flash energy for a perfect exposure. The optional Air
Remote TTL merge camera and flash into one and controls the flash fully automatically
without manual metering. Compatible cameras can be found on Profoto.com.