Nanguang NG-10X Studio Light Focus Lens Bowen Mount for Flash& Led Light with 4 Color Filter Bowen Mount Suitable for most of the led studio light and flash studio light.Angle adjust from 10-40 Rotated flexible design enables you adjust light angle by rotating lens collar Suitable for shooting outline light or long distance light Brightness will increase 4 tims after installation,10 times brigter when most focusing The front focus lens can be added filters