2. Slow sync your fast action shots for a sense of speed
To give your low-light action images a standout, almost surreal effect, consider blending flash with a slow shutter speed. The result is a striking image that not only freezes your subject, but also captures any movement as a blur. The underlying technique is similar to shooting a flash-lit subject at sunset – the exposure of the subject is controlled by the flash power, aperture setting and ISO value, while the shutter speed governs both the brightness of the background and how much movement is captured.
"You don't freeze action with the shutter speed, as you would during the day, you freeze the action with the flash," explains Lorenz. "And then, because of the longer exposure time, you get more ambient light. You control how much you want to show in the background with the shutter speed, so if you want to reveal more detail, you can expose a little longer."