The Wide 100 AC slave provides 100 degree coverage and is an excellent unit for direct lighting when using wide angle lenses or for broad and soft coverage. When you want to concentrate power in a single direction, use multiple Wide 100 ACs to boost the f-stop. Like the other Morris AC Slaves, it is triggered by your main flash unit through a built-in slave sensor. In addition, the lamp base fits any standard 110V light socket. The Wide 100 has a guide number of 36 with ISO 100 and recycles in 5 seconds.