Interference-free, Cordless Remote Flash Control
If you shoot weddings, events, industrial or other location work, Pro-Sync is for you. Pro-Sync provides cordless, remote flash control with virtual immunity to interference. Unlike radio frequency (RF) remote flash control systems, Pro-Sync uses state-of-the-art coded infrared technology to fire remote flash units. Common sources of radio interference, like cellular phones, pagers, and cordless microphones (increasingly common at weddings) can disrupt radio flash control signals, but not Pro-Sync. And because the Pro-Sync signal is encoded, it cannot be triggered by any flash or light source.
The transmitter can be mounted on, and fired by any standard camera hot shoe (or connected to a PC terminal for off-shoe use). Just slide the compact transmitter onto your camera; no cords, no antenna, nothing to clip to your belt. A pair of "AA" batteries in the transmitter powers up to 5,000 shots, with recycle times averaging less than a second - faster than most any flash- so your Pro-Sync is up and ready when you are.
Each time you shoot, the transmitter fires, and an "explosion" of coded infrared light fills the room, bouncing off walls and around corners. You can't see the signal (neither can your film), but the Pro-Sync receiver can.