The Y-Type Lens Support from Sunwayfoto is an aluminum attachment with rubber bumpers designed to provide physical support for any long lens, thus relieving the potentially damaging pressure on the camera body's lens mount. It is combined with Sunwayfoto Multi-Purpose Rails and can be adjusted for the height of nearly any lens. It comes with a removable adjustment knob that uses a male 1/4"-20 post to mount onto rails, and loosen the support to adjust its height.