Brighter Than Ever The Fresnel 2x design features dual optical intensifying elements, a large 5.5” front Fresnel lens, improved ventilation, and the elimination of light leaks, making this the ultimate Bowens Mount Fresnel. Dual Lens Optical Design The rear lens focuses and magnifies the beam onto the larger 5.5” front Fresnel lens, maximizing light utilization. Our dual lens optical design makes the Fresnel 2X twice as powerful as the original Aputure Fresnel, and makes the 120d II almost 10 times brighter than with the reflector.