7
CONVENTIONAL FLASH VS. EINSTEIN
TM
IGBT CONTROL
Figure 2 Variable Voltage at 1/2 Power
100%
50%
10%
t.5
1/1600
t.1
1/470
Figure 4 IGBT Control at 1/2 Power
100%
50%
10%
t.1
1/2050
Figure 3 IGBT Control at Full Power
100%
50%
10%
t.1
1/588
t.5
1/2000
Figure 1 Variable Voltage at Full Power
100%
50%
10%
t.5
1/2000
t.1
1/588
Conventional Voltage Control:
Figures 1 and 2 show the flash waveform from a conventional variable voltage monoflash.
As power is reduced, both the t.5 and t.1 flash durations become longer as power is reduced. Note that even beyond the t.1
point the flash continues to trail off slowly, adding motion blur. The color temperature drops as power is reduced.
Einstein
TM
640 IGBT Control:
In Figures 3 and 4, notice the flash abruptly shuts off at whatever point is needed to produce
the desired output. The t.1 flash durations can be as fast as 1/13,500 second at low power, producing crisp action freezing.
But the color temperature rises as power is reduced. This depicts the Einstein
TM
Action Mode
. In the
Constant Color Mode
,
the Einstein
TM
processor compensates by adjusting both the shutoff time and the voltage such that a constant 5600K color is
achieved. The flash duration drops less rapidly as power is reduced, but still produces very short t.1 times (1/8000 second at
minimum power) and extremely sharp action freezing.
See graph below.
POWER VARIABILITY RANGE (Wattseconds)
640 320 160
80
40
20
5
2.5
t.1 FLASH DURATION (Seconds) VS POWER SETTING
COLOR TEMPERATURE VS POWER SETTING
FULL
1/2
1/4
1/8
1/16
1/32
1/64 1/128 1/256
1/10,000
1/3000
1/1000
1/300
1/100
6000
K
5500
K
5000
K
(Graphs derived from published specifications and/or lab testing by Paul Buff)
8.
Any new legacy lights (White Lightning
TM
, AlienBees
TM
, Zeus
TM
) will require the specification process as outlined in the Cyber
Commander
TM
user manual.
9.
All lights which have previously been programmed will remain unaltered.
Once you have completed adding lights to a setup, it’s always a good idea to then store the new or revised setup to one
of the 50 available stored preset locations (outlined in the Cyber Commander
TM
manual) for future reference.
