Metz Mecablitz 58 AF-2 System Flash Unit MZ58321 is the most powerful of the Mecablitz system flashes. With an impressive guide number of 58, this Metz product is strong enough to illuminate any setting exactly to your specifications. Pure X's Photoflash Lamp of the Year for 2010, the Metz Mecablitz 58 AF-2 TTL Flash Unit has all the modern features you could hope for from a system flash unit. The fully pivoting reflector, pop out reflector card, and integrated second reflector make the unit's bounce flash capabilities a force to be reckoned with when attached to the digital camera of your choice. This photo and video light includes multiple zone AF flash metering, a 24-105mm motor zoom, 25 partial lighting levels in manual flash mode, high speed synchronization, and a simple, effective interface. The crown jewel in Metz's Mecablitz line of products, the Metz Mecablitz 58 AF-2 Digital Flash will serve the discerning professional photographer extremely well.