Designed for the STORM 80c light fixture, the CF4 Fresnel from Aputure intensifies the light output by 5.5 times, producing up to 36,000 lux. It focuses the light's beam spread from a tight 15° to a 40° medium flood with smooth falloff from the center to the edge. Compatible with CF4 barndoors, the CF4 Fresnel has a Mini ProLock mount and comes with a carrying case that can also fit the separately available barndoors.