A versatile lens for photographing distant subjects, the Vivitar 420-800mm f/8 Telephoto Zoom Lens features a convenient threaded T-mount for adapting to a wide variety of camera types. The optical design features multi-coated glass lens elements, and a lens hood is incorporated into the design, which both help to suppress lens flare, ghosting, and surface reflections for increased contrast and color neutrality when working in strong lighting conditions. Manual focus operation is possible, and a built-in rotating tripod mount enables sturdy mounting of the lens to a tripod or monopod as well as seamless switching between shooting orientations.