This lens support screws directly into the 1/4 20 screw hole that can be found under many different lenses and attaches in an upside-down T shape to rods running under your camera to create a solid support. It includes our Q-Mount which can `snap' onto rods with the clamps facing up or down and tightens with a quick release ratcheting lever on either side of the mount. It can be installed anywhere on a 15mm lightweight spaced rod system without you needing to remove any other accessories. In the central quick release port in the middle of the Q-Mount there is a female/female 15mm rod with a screw adapter on the end. This is the screw that attaches to your lens.