Metz Mecablitz 15 MS-1 Digital Ring Macro Flash Dedicated digital TTL mode compatible with Canon, Nikon, Olympus/Panasonic, Pentax/Samsung and Sony Alpha digital TTL systems. Easy slave mode to learns light signal from any camera system. P/C sync port for operation with manual cameras. USB upgradeable Manual mode with 6 partial light output levels Included adapter ring for 52 mm, 55 mm, and 58 mm.