GGI FireWire 800 9-pin Male to FireWire 400 4-pin Female
Amazon.com: Yeworth 6FT Firewire High Speed IEEE 1394 Firewire 800 to Firewire 400 Cable, 1394B 800-400 IEEE 9 Pin Male to 4 Pin Male Cable for MacBook Pro, Mac Mini, iMac PC, Digital Cameras, SLR : Electronics