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 - Walmart.com
Sima USB Multi Cable with FireWire-400 SUO-200M B&H Photo Video
In an attempt to get access to content on my old MiniDV cam tapes, I attempted this long shot of an adapter hell... It's a Firewire 400 cable, to a Firewire 800