Custom Fresnel: The Aputure CF4 Fresnel is a compact fresnel with Mini ProLock mount designed for the Storm 80c Point Source Fixture Light Amplification: It intensifies Storm 80c daylight (5600K) output by 5.5 times to 36000 lux at 1 meter Flood Range: It delivers a 15 to 40-degree spot-flood range Accessory: Included is a protective carrying case for storing and transporting both CF4 Fresnel and CF4 Barn Doors Smooth Falloff: It amplifies the light output of the Storm 80c providing smooth falloff from center to edge of output The Aputure CF4 Fresnel in Black is a compact fresnel with a 4-inch diameter lens and Mini ProLock mount optimized for use with the Storm 80c Point Source Fixture. The CF4 Fresnel optimizes and amplifies the light output of the Storm 80c providing smooth falloff from center to edge, all with a compact form factor. Compatible with a separately available CF4 Barn Door, the CF4 Fresnel is a compact solution for users to achieve greater versatility and control of their STORM 80c’s output. The CF4 Fresnel’s carrying case comfortably fits the Fresnel and its Barn Doors within.