Handbook of High Speed Photography - IET Labs, Inc.

Section 6.4. Photo- and reluctance-pickup triggering are best for this
purpose. Strobe synchronization derived from the film transport is use
ful for both transient and repetitive studies.
Figure 6-4. Ring winding yarn on textile spindle at 10,500 rpm. Camera
framing rate is approximately 16 frames-per-second.
As the motor speed is usually variable on high-speed cameras,
it may be practical to use this control to synchronize each frame with
a given position of the subject and thus to take movies that show a
moving object or operation as if stopped or moving in slow motion. At
higher speeds this technique may be unsatisfactory, as much of the lim
ited film capacity of the camera is wasted while film transport is ac
celerating and the operator adjusts the speed.
It is usually a simple matter to disable the shutter of a high
speed camera or lock it in the open position and then rely completely
upon the stroboscope for effective shuttering. Such unsynchronized
shutterless camera operation, with the flash rate set by the strobo
scope's internal oscillator is useful for studies of both repetitive and
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