Aputure CF4 Fresnel for Storm 80c Fixture with 4-Inch Diameter Lens (Black) and CF4 Barn Door BundleAputure CF4 Fresnel for Storm 80c Fixture with 4 Inch Diameter Lens and Mini ProLock Mount (Black) Compact and designed to work with the Storm 80c Point Source Fixture, the Aputure CF4 Fresnel in Black has a 4 inch lens and a Mini ProLock mount. With a small form factor, the CF4 Fresnel smoothes out the falloff from center to edge by optimizing and amplifying the Storm 80c's light output. The CF4 Fresnel is a small solution that allows users to have