This is a handy and simple-to-use diffuser that fits any S-V 10" reflector to create soft, smooth highlights on your subject. Elastic is sewn around the edge for easy on and off. Itís great for use with fluorescent lamps and is even safe for use with 250-watt ECA lamps. The TD10 is color-neutral so it wonít affect color balance. Cuts approximately one f-stop.