The Graslon Spark Pop-Up Flash Diffuser softens the light of your DSLR camera's built-in pop-up flash in order to minimize backscatter and hard shadows and go easier on your subject's eyes. The diffuser is significantly greater in size than the built-in flash, and slips over it, creating a larger light source and taking advantage of whatever bounce is available. This reduces overblown highlights and softens shadows for more pleasing images. The reflector system ensures that light will be distributed across the whole face of the lens without any hot spots or dead spots. The Graslon IBT mirror design provides soft results. The Spark easily slides on and off your camera's hot shoe. It is compatible with most digital SLRs. It won't hinder the normal triggering of the flash and does not usually require you to alter any settings.