The Next Generation All-Purpose Flash.The Speedlite El-1 (ver. 2) is the next generation, all-purpose flash that professionals and advanced amateurs have been seeking, providing durability, reliability and a range of power that opens up a number of possibilities. The new Xenon flash tube offers increased stability for flash output and 14 f-stops of total flash exposure range allowing you to shoot anywhere from a bright 1/1 to a dim, low power 1/8192 to precisely sculpt your scene with light.Maximum Guide Number of 190 Ft./58m at Iso 100 Zoom Flash Head with Wide Range of 24-200mmThe Speedlite El-1 (ver. 2) has a maximum guide number of 190 ft. (58m) at Iso 100 to provide you the versatile lighting you desire for flash photography in a variety of situations, such as outdoor weddings, portraits, and low light scenarios during indoor events.