The Quantum FW52 FreeWire TTL Adapter allows you to control the camera flashes without wires. If you want to shoot subjects at a longer distance where TTL cables are not easy to be used you can use this wireless TTL flash trigger.You can get camera controlled soft lighting for commercial photography by mounting a Qflash in a lightboxThe Quantum FW52 FreeWire TTL Adapter can be used with Qflash T and Qflash X seriesThe Nikon D1X and D1H are compatible with the Quantum FW-52 Wireless Flash Trigger, and Nikon D1 is not compatible with it