SCHOTT VisiLEDs MC Serie Conseils D'utilisation page 52

Flash mode
Please note
50 | VisiLEDs MC Serie
● Whenever a new delay time is sent from the PC to the controller automati-
cally the accuracy of setting the delay by MC 1500 is adjusted. It amounts
always to 0,5% of the set delay time. For this reason it is not possible to
store different delay times from PC correctly in the different memory
stations of the MC 1500. We recommend to use in trigger mode one
memory station only. Alternativly identical delay times could be stored in
all used memory stations.
When the computer is controlling the MC 1500 the pulse duration of the indi-
vidual pulse can be set to the exact µs. In addition the pulse intensity can be
adjusted by the exact percentage for each LED unit. When the pulse duration
is less than 10 ms an overdrive of the pulse intensity up to 300 % of the conti-
nuous light is possible. Otherwise the maximum intensity is 100 %.
In flash mode the set mixed light can be momentarily intensified by an inten-
sive single pulse so that the exposure times of connected photo equipment
can be reduced – the mixed light "flashes".
The MC 1500 controller possesses a connection for a flash cable (14). This
cable (accessory) can be connected to cameras or micro-photographic equip-
ment via an S contact.
When recording an image the LED illumination system emits a photoflash in
addition to the set continuous light. In this way the intensity of each unit is
momentarily increased by a factor of 4. So the set mixed light characteristics
remain constant during flashing!
To avoid the illumination heads being overloaded the flash is only emitted if
both illumination units are in the 0 to 3 brightness range. In addition the
strobe and trigger mode must be deactivated for both LED illuminations.
A maximum of two green LEDs of the display (4) must be lit up for each
●
VisiLED unit. Please also check the second unit by pressing (1).
● The flash intensity automatically results from the light intensity setting of
the continuous light. The highest intensity of the flash pulse is 236 % when
the affected LED unit is set to 59 % brightness.
● The flash pulse is triggered by bypassing the contacts of the flash connec-
tion (14) on the back of the controller (3.5 mm jack socket).
When the computer is controlling the MC 1500 the flash duration can be set
to the exact µs.
The flash is always emitted simultaneously for both illuminations. If only the
flashing of one of the VisiLED units is required then the second LED unit
should be dimmed down to 0 brightness