Your Vanguard Endeavor HD or XF spotting scope can become a powerful telephoto lens for your DSLR camera with this PA-202 Digiscoping Adapter. The lens remains mounted on the camera; all you have to do is slip the adapter over the lens, tighten the thumbscrew for a secure attachment, then slide the adapter over the scope's eyepiece. The scope's magnifying power and premium optical elements will help you capture detailed images of distance objects and scenes.