Aputure CF4 Fresnel for Storm 80c Fixture with 4-Inch Diameter Lens and Mini ProLock Mount (Black)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