The Benro 95-82mm Step Down Ring is designed for use with the Benro FH100 or FH150 filter holder in combination with 95mm adapter ring. It allows you to attach your filter holder to lenses with an 82mm diameter screw thread mount. This stepping ring is an alternative to purchasing an 82mm adapter ring for the 100mm system, and instead allows you to 'step down' to use your 95mm adapter ring with lenses sized 82mm. When used in combination with a 95mm adapter with the 150mm system, it will allow the system to be used with lenses sized 82mm.