Take fashion outside the studio with the Quadra Ringflash! This is the ultimate companion to your Quadra system. The design of this ringflash makes it extremely easy to use, even handheld. Technical Specifications: Cable length: 78.74 in. Aluminum case material; Changeable Reflector; depth: 9.06 in; f-stop (@2m ISO 100max power @1/250 sec): f/22; flash tube type: 4 pole - speed; height: 12.60 in; inside diameter: 3.94 in; outside diameter: 7.87 in; user replaceable flashtube; weight: 3.97 lbs; width: 7.87 in.