Gary Fong demonstrates how to use a two-flash setup for quickly changing colored gel backgrounds. On camera is an SB900 being utilized as a flash trigger only (in Master mode). Flash two is a Nikon SB700 with a Gary Fong Powersnoot, on Channel 3, and called, “Unit B”. It is on half power and on a light stand with a pivoting head (this can also be held easily by an assistant). Flash 3 is a Nikon SB700 on the base stand, pointed straight up with a Gary Fong Lightsphere Collapsible holding either the Red, Green, Blue or Amber Gels.