Canon 540EZ - Manual (Page 37)

3. Stroboscopic Flash
The 540EZ’s stroboscopic flash function rapidly fires the flash several
times in succession during a single exposure to record the flowing motion
of a subject.
The stroboscopic firing frequency (measured in number of flash bursts
per second, or "Hz") can be set within in a range of 1 Hz - 100 Hz. The
frequency is set in 1 Hz increments between 1 Hz and 20 Hz, in 5 Hz
increments between 20 Hz and 50 Hz, and in 10 Hz increments between
50 Hz and 100 Hz. Up to 100 continuous bursts is possible during a sin­
gle exposure, but this limit differs depending on the firing frequency and
output power level used. For details, refer to the "Maximum No. of
Continuous Flash Bursts” chart on page 21.
Use fresh batteries when using
stroboscopic flash.
Stroboscopic flash is not possible
at the 1/1 and 1/2 power settings.
Due to the slow shutter speeds
required with stroboscopic flash,
we recommend using a tripod
and the Remote Switch 60T3
We recommend using an external
power supply when performing
stroboscopic flash phofography.
u
If the stroboscopic flash has been fired 15 times continuously, allow the Speedlite
to rest for 15 minutes to prevent the flash head from overheating. Overheating
can cause the flash head to breakdown.