Profoto Pro-B4 1000 Air, Руководство пользователя

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Pro-B4 1000 Air
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9.4 (660Ws). The maximum output of outlet B is always limited to 9.4 (660Ws) in NORMAL
mode. NORMAL mode is configured for short flash duration and optimal color temperature.
See more in section
Flash duration & Mode control .
By setting the Mode Control [13] to MASTER, the energy level will be simultaneously
adjusted for outlets A and B. Either Control A [16] or Control B [17] can then be used to
adjust the energy level for both outlets.
noTe:
The generator has auto dump functionality and will automatically discharge if the output is lowered. The auto
dumping is primarily for safety reasons in service and therefore quite slow. To save time a flash can be triggered to
discharge the generator when the output is lowered.
flash duration & Mode control
Pro-B4 has very short flash durations on all energy settings. Even at full output it is as short
as 1/2,400s. Short flash duration has more advantages than freezing a moving object, for
example to cut out exposure influence from indoor ambient light as well as direct sunlight.
The flash duration can be displayed in the Displays A [14] and B [15], by pushing the Display
Button [6]. When flash duration is selected, 1/s is shown in the Indicator Display [7].
The flash duration varies with the energy level setting, see section Technical data. The
shortest flash duration is obtained when the Mode Control [13] is selected to FREEZE mode
and the energy is set 4.7 f-stop (25.4 Ws). The flash duration in this setting is 1/25,000s.
As has been indicated the flash duration is depending on Mode Control [13] setting. The
modes are configured for different applications of photography.
• FREEZE: Optimized for extremely short flash duration and fast recycling. Recommended
for applications where extremely short flash durations or extremely fast image
sequences are required.
• NORMAL: Optimized for a stable light output and neutral color temperature. The flash
duration is kept short on all power settings. This setting is recommended for most
applications.
• MASTER: As NORMAL mode but energy on output A and B is simultaneously adjusted
if turning either Control A [16] or Control B [17].
noTe:
Setting Mode to NORMAL or MASTER will change the possibilities to adjust light output on both outlets. See more
in section
Energy range and control .
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