The Aputure Fresnel 2X is an attachment for use with LS C120d, LS C120d II, and LS C300d from Aputure as well as other Bowens Mount LED lights. It works by offering an angle variable beam spread from 12 to 40 degrees. It is also able to intensify the output of the light, thus flooding and spotting light. For example, Light Storm 120d II from Aputure can output up to 14x its standard power with the Fresnel 2X.It adjustable and has stable as well as smooth zoom in/out. This lens mount attachment has a dual lens design and has no light ,also the Fresnel 2x design features dual optical intensifying elements, a large 6” front Fresnel lens, improved ventilation, and the elimination of light leaks, making this the ultimate Bowens Mount Fresnel.leakage.