Canon 155A strapped to the cross bar fired as a slave. SB600 on camera to act as fill and to fire the main light.
Camera: Nikon D40
Exposure: 0.01 sec (1/100)
Aperture: f/6.3
Focal Length: 18 mm
ISO Speed: 400
Exposure Bias: -1/3 EV
Flash: Flash fired, auto mode
ISO Speed: 400