One of the most fundamental skills any photographer can have is the ability to mix both ambient and artificial light. This helpful video takes it a step further by using high speed sync to photograph action while still maintaining some ambient light to complete the shot.
Coming to you from Gavin Hoey with Adorama TV, this great video tutorial details how to use high speed sync to photograph action while mixing ambient light and artificial light. In this case, Hoey wants to mix the two simply because without context, a BMX biker suspended in mid-air is simply less impressive than having the surrounding environment. To do this, Hoey demonstrates how using traditional flash isn't enough, as he bumps up against his camera's maximum sync speed while the rider is still blurred. To get past this, he switches to high speed sync mode to increase his maximum shutter speed. He then keeps his aperture wide open and varies the ISO to control the ambient light to provide him a nice balance that shows the BMX park in addition to the rider. It's a versatile and highly useful technique. Check out the video above for the full rundown of the technique.