Having mentioned strobing flash a few times I thought I should post an example.
Strobing or multiple firing of the flash is caused by trigger bounce. In this case the spoon can be seen to have bounced after the first exposure and remade the flash contact while the shutter was open.
Not good in this case, and as the exposure was 2 secs allowing for tripping the camera and aiming and dropping the strawberry from up a ladder, Stevie had to quickly place a card in front of the lens immediately the flash triggered for the first time. Lots of fun here. On one occasion she was so wound up she did that when I tripped the shutter and before the stawberry hit the spoon. You can probably imagine how she was with the bulb shot
. In the dark, and they really do go with a bang
. Hard life being my assistant.
There are possibilities though for a controlled strobe of a moving object. Possibly using a pendulum as a trigger. More things to work on.
Don