【One-Handed Focus Adjustment】 SmallRig RA-F150 Fresnel Lens is a pro-focusing attachment that allows more accurate flooding and spotting light onto any given object or scene. Simply rotate the focus button with one hand without any risk of burning your hand by the lens body; adjust the flooding and spotting light output from 10° to 40° beam angle. | 【Triple Cooling System】 The Fresnel lens achieves maximum efficiency in heat dissipation through passive cooling fans, physical heat dissipation holes, and metal heat-conducting plates. Compatible with Bowens mount COB LED lights with less than 600W output to ensure maximum longevity. | 【13.2x Light Output Illumination】 The spot lens adopt high-transparency, high-temperature-resistant borosilicate glass, using the process of high-temperature lamination, can enhance the glass's heat resistance, also improving the glass's transparency and light transmittance. It achieves a maximum brightness increase of 13.2 times. | 【Wide Compatibility】The standard bowens mount interface is compatible with SmallRig RC120 / 220 / 350 / 450 as well as other Bowens mount lights on the market. Also, this Fresnel lens can work with SmallRig 8-leaf Barndoors (ID: 4204) to create more lighting effects. | 【Packaging Includes】Storage bag for greater protection while transportation. Lightweight,shockproof,and pressure-proof storage bag to protect your lens.