The Metz Mecablitz 64 AF 1 Digital Flash is a powerful unit with a guide number of 210 39; at ISO 100 and 200mm that works with Canon E TTL E TTL II. This model is equipped with a metal shoe for durability. The unit features an automatic zoom with a range between 24 200mm and comes with a built in wide angle diffuser that extends its reach to 12mm. The 64 AF 1 also has a secondary light reflector with two output levels for achieving even lighting as well as wireless functionality as either a master or slave unit. The flash head can tilt from 9 to 90deg. and rotated 300deg. for use in a variety of situations and features a modeling light for previewing the look of shadows before taking a shot. There is also a color LCD touchscreen on the rear of the flash that allows you to quickly see and change settings. Multiple flash modes are available, included strobe and server with a learning function. High speed, first and second curtain synchronization is possible and the device has sync, power and USB ports built in.