SmallRig RA-F150 Fresnel Lens 4246 is a pro-focusing attachment. It allows more accurate flooding and spotting light onto any given object or scene. The innovative design of a high-transmittance Fresnel lens with a diameter of 150mm and a built-in reflector brings 10 times more output. Innovative zoom-in/out design allows adjusting the focus with just one hand, saving time during the shooting and eliminating the possibility of overheating your hand. Rotate the focus button to flood the beam angle from 10° to 40°. The standard Bowens mount interface is compatible with SmallRig RC120 / 220 / 350 / 450 and other Bowens mount lights on the market. This Fresnel lens can work with SmallRig 8-leaf Barndoors to create more lighting effects.