Metz MZ 15210  Macroslave 15MS-1 Macro Flash Digital Kit (Black) Adapter rings included from 52mm to 72mm Wireless Control. The Ratio Control feature allows for separate light distribution settingsfor the left and right sides of the flash, while the variable powersetting allows for 6 levels of output. In addition, the included diffuser provides further softening of the light output. Gives balanced precision illumination