Calculating the shutter speed, Flash count ÷ flash frequency = shutter speed – Canon Speedlite EL-100 User Manual
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Stroboscopic Flash
Calculating the Shutter Speed
Flash count ÷ Flash frequency = Shutter speed
For example, if the flash count is set to 10 (times) and flash frequency
to 5 (Hz), set the shutter speed to 2 sec. or longer.
o
To avoid wearing out or damaging the flash head from overheating, do
not use stroboscopic flash repeatedly more than 15 times. After 15 shots,
stop using the flash for at least 10 min.
o
Shooting more than 15 times will activate a safety function and restrict
flash firing. Stop using the flash for at least 40 min.
o
Stroboscopic flash is most effective when shooting subjects with high
reflectance against a dark background.
o
Use of a tripod and remote switch or remote control (sold separately) is
recommended.
o
Flash output cannot be set to 1/1 or 1/2 power.
o
Stroboscopic flash is also available when the camera’s shooting mode is
set to <
Bulb(B)
>.
o
For details on the maximum continuous flash count, refer to the separate
Supplemental Information.
o
A flash count display of “----” indicates that the flash will fire continuously
until the shutter closes or the flash charge is depleted.