The Cavision Adjustable Height Lens Support with Locking Lens Belt for 15mm LWS Rods provides up to 60mm of vertical adjustment, enabling it to support lenses with a wide variety of outer diameters. The support sits in a bridge between two rod supports that support the LWS (lightweight standard) distance 60mm on center. Rotating a knurled ring adjusts the height of the support, and a screw stop prevents the support from coming out of the rod support bridge.