LIPPMANN F20 9 Inch Fresnel Lens Bowens Mount 10°- 45°Optical Focusing Adapter 10X Brighter with Detachable 4-leaf Barn Door for Studio Continuous Light Shaping Tool Features: 【10°-45°Beam Focusing Angle】To present the ultimate visual perception of the large screen level, strong beam impact and virtual and real changes are indispensable. Rear zoom knob design, the lens does not turn, and does not affect the 4-leaf barn door light control. 【10X Brightness Increasing】Adopting customized 224mm Fresnel lens that can provide stronger light concentration, higher light source utilization, and achieve a 10X illuminance increase! 【Detachable 4-Leaf Barn Door】Light shaping plays a decisive role in the portrayal of film atmosphere and characters. Fresnel lens with detachable 4-leaf barn door can shape the direction and shape of the light beam, creating a high standard of film and television works. 【Standard Bowens Mount】Equipped with standard Bowens Mount, the Fresnel Lens is compatible with most studio LED continuous light and strobe light. Easy to install. 【Convenient Storage and Carry】Easily store and transport your fresnel lens with the included carrying bag featuring a convenient handle for added portability and protection. Specifications: Model: F10(6 inch, for continuous light under 200W)/ F20(9 inch, for continuous light under 600W ) for option Connector: Bowens Mount Focusing Angle: 10°-45° Packing List: 1 * Fresnel Lens 1 * Barn Door 1 * Storage Bag