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When setting the pulse duration in degrees, what you set is what you
get. Refer to the image on the right for the difference between a 1° and
5° (of rotation) flash duration.
There are two methods of adjusting the flash pulse width and hence
the brightness and consequently the blur. For setting Brightness see
section
.
6.2 Brightness in Degrees of Rotation
Brightness can be set from 0.2 to 14° out of 360. The higher the setting,
the brighter the strobe appears to be but the more blurred the target is.
Optimal setting to stop motion is 1.8 to 3.6°. The number of degrees is
a proportional amount and remains constant as the flash rate increases
or decreases. The strobe automatically calculates how wide the pulse
width should be at different flash rates to keep the blur constant—the
faster the flash rate, the narrower the pulse width. The pulse width
equals (setting in degrees/360) x (1/flash rate in Hz).
6.3 Brightness in Pulse Duration
Brightness can also be set to a fixed duration pulse in milliseconds. The
flash rate remains constant irrespective of the flash rate, thus as the
flash rate increases, the image will get brighter and more blurred.
There are two limits maintained by the strobe—the flash pulse
width can never be greater than 2.0 msec (milliseconds) nor can
it exceed 14° of rotation.
The strobe automatically adjusts the pulse width and rotation values
as the flash rate is increased or decreased to maintain the limits at all
times. For example, a flash rate of 600 flashes per minute (10 Hz), 14°
of rotation represents a flash pulse width of 3.8 msec. The strobe will
limit this value to 2.0 msec or 7.3° of rotation (blur).
NOTE:
