1The light barriers and grid can make the light focus on a spot to make the back ground look dim. 2look dim. Thread adjuster makes focusing easier and convenient with single hand, the focusing range is 45 to 17, helps to create dramatic effect. 3Suitable for Bowens mount lights, wide compatibility makes it easy to work with other lighting equipment for other purposes. 4Fresnel lens is clear and durable, can provide even light and reduce the partial spherical image aberration. By rotating it, user can get different effects of light, spotlight and floodlight. 516.8cm grid can focus light and make the shadow transitions more uniform and directional. It can also be used on 7inch photography to create spotlight. This product is a photography light accessory, designed for focusing, which can control the light more accurately and make the light focus on the part which needs to be strengthened. Features:The light barriers and grid can make the light focus on a spot to make the back ground look dim.Thread adjuster makes focusing easier and convenient with single hand, the focusing range is 45 to 17, helps to create dramatic effect.Suitable for Bowens mount lights, wide compatibility makes it easy to work with other lighting equipment for other purposes.Fresnel lens is clear and durable, can provide even light and reduce the partial spherical image aberration. By rotating it, user can get different effects of light, spotlight and floodlight.16.8cm grid can focus light and make the shadow transitions more uniform and directional. It can also be used on 7inch photography to create spotlight.Specifications: Brand: NiceFoto Model: FD-110 Color: Black Main Material: Aluminum alloy & ABS Focusing Angle: 45-17 Grid Angle: 30 Light Barrier: 4pcs Compatibility: For Bowens Mount Lights Folded Size: 19.5*19.5*12cm / 6.68 * 6.68 * 4.72inch Package Content: 1 * NiceFoto FD-110 Fresnel Mount (with barn door) Note: The video light and light stand are not included in Fresnel mount.