Flash technique: freezing subjects with flash

When photographing very fast moving subjects, like insects in flight, you may find the duration of the Speedlite flash is too long to freeze the motion. If this is the case, the solution is not to increase the shutter speed on the camera as this will not affect the final image except to reduce the amount of ambient light collected. Instead, you should reduce the flash power as the lower the flash power, the less time the tube has to remain alight. Try increasing the ISO to compensate, or using more flashes at lower powers to achieve the same amount of light.