7
Flash Modes Cont.
S2: Slave Triggering Mode
RPT Mode: Stroboscopic Flash
Press Mode Selection Button (17) to enter S2 mode. In this mode, the
flash unit can function as a slave flash for creating multiple-lighting
effects. It is respectively applicable to a TTL system. In S2 mode, the
flash unit will ignore a single “pre-flash” from the master flash and will
only fire in response to the second, actual flash from the master.
Press Mode Selection Button (17) to enter RPT mode
(Multi/Stroboscopic flash). With stroboscopic flash, a rapid series of
flashes is fired. It can be used to capture multiple images of a moving
subject in a single photograph. You can set the firing frequency
(number of flashes per sec. expressed as Hz), the total number of
flashes and the flash output.
For setting procedures, see the following:
Press the Mode Selection Button (17) so that “RPT” is displayed.
Press Set Button (18) to select the item to be set. The item blinks.
Rotate Select Dial (21) to set a desired number.
Calculating the Shutter Speed
During stroboscopic flash, the shutter remains open until the firing stops.
Use the following formula to calculate the shutter speed required to
capture the full sequence of flashes:
Number of flashes / Firing frequency = Shutter speed
For example, if the number of flashes is 10 and the firing frequency is
5 Hz, the shutter speed should be at least 2 seconds.
Note:
- Stroboscopic flash is most effective with a highly reflective subject
against a dark background.
- Using a tripod, a remote switch and an external power source is
recommended.
- A flash output of 1/1 or 1/2 cannot be set for stroboscopic flash.
- Stroboscopic flash can be used with “BULB"
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