A single photo at two different speeds
Note: many cameras, including basic ones, have night-portrait scene mode which can be used instead of shutter-prioty + ?flash-mode?, though with less control.
- A camera with shutter-priority mode
- A camera with ?flash-mode?
- Another person.
- Artificial light sources behind your subject
- Night time
- Shutter-prioirty mode at 1/4 or slower. This creates motion blur. The slower the shutter speed the more blur you're get
- Select ?flash-mode?. If you camera gives you the option, select 'flash-first, keep shutter open', rather that 'keep shutter open, flash-last', because 95% of the time it's easier to work with.
- Position your subject so they're in front of the artificial light sources
- If your light source moves, for instance they are cars, then hold the camera steady. If they don't, then take a photo and quickly pan your camera around.