A versatile lens for photographing distant subjects, the 420-800mm f/8.3 HD Telephoto Zoom from Opteka features a convenient threaded T-mount for adapting to a wide variety of camera types. Its 4 elements, 2 groups optical design features a super HD multi-coating, and a lens hood is incorporated into the design, 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.