You can control the flash exposure through your camera with the help of wireless Quantum FW-59 Freewire TTL Adapter.The Quantum Wireless Adapter can be used for location portraiture such as beach, park, and desert as well as to shoot long-distant subjects where it is impossible to use TTL cablesMount a Qflash in a light box for commercial photography and shoot wireless TTL for camera controlled soft lighting using the Quantum TTL AdapterQuantum FW-59 Freewire TTL Adapters can work with both Qflash T & Qflash X series