A tip today about something rather simple, which can be a lot of fun
A modern flash like a Canon 600EX or Nikon SB-900 can do “stroboscopic flash”.
To use it, simply:
- Set the flash’s mode to stroboscopic (“Multi” on my Canon flashes);
- On the flash, select frequency and duration and power level; see below for the settings I used yesterday;
- On the camera, which is probably on a tripod, select a shutter speed at least equal to the duration above;
- Make sure it is dark enough so that this shutter speed does not light up everything;
- Have a black background
- Move and shoot!
In this case, 1/128 is the power level; — is the duration (so I set it to one second in my case); 1 Hz is the frequency (10 Hz in my case).
The result, set to the settings above:
The flash was set to:
- Frequency 10 Hz
- Duration 1 second
- Power level 1/32 power.
Camera was set to 1 sec shutter speed. Because it took assistant Rob about a second to move his arm.
You will note that the higher the flash power level, and the shorter the time, the fewer flashes you can do. This is because the flash runs out of power after a few flashes: the higher the power level, the earlier that happens.
Go have some fun!