The new-at-this-time, lighter Canon EF 600mm f/4 IS II USM Lens is going to be a good choice for air show photography. I have not yet had the opportunity to shoot an air show with this lens, but ... I was sitting on my Walkstool shooting a soccer match when this large vintage military plane flew overhead. I quickly reduced the shutter speed enough to allow some prop blur (showing that the plane in indeed flying), lifted the camera and lens (and monopod), tracked the plane and grabbed a few shots.