【Fresnel Optics】Fresnel lenses can output high-intensity, high-uniformity, high-quality cool white/warm white light beams. | 【Video Light Parts Use】Which is desirable in color-critical applications like studio,photostudio,church events,stage etc. Used in conjunction with a video light to create a beam with clear direction and shape. It’s perfect for shooting profile, long distance shooting or old-style Hollywood effects with four color gel filters. | 【Easy Use】Fresnel Focusing Lens adapter adopts Bowens mount,suitable for most of LED studio light and flash light. | 【Large Use Scale】Rotary telescoping design, by rotating twisting to adjust the light focus angle from floodlight to spotlight (10-45 degrees) and can increase brightness of original light by up to 5-10 times.With a smaller point source as speed lights.it may work better. It allows you to get a concentrated spot of light with a nice falloff, and adds a lot of control to an otherwise "light bomb" of light. | 【Adapted Power】It increases background spot light significantly using a speedlight. Compatible with flash light LED studio light with power less than 200W. | Note: This product is suitable for COB beads photography lights, such as red wave pattern is a normal phenomenon. This Studio Light fresnel focus lens adapter only work for Bowens mounts. Light is well controlled and can focuses well.Inexpensive option if you need a fresnel lens.Would be better with constant light LEDs than strobes.