The Opteka 650-1300mm high definition super telephoto zoom lens is perfect for the professional and amateur photographer alike. There is a built-in, rotating tripod mount for easily attaching to your tripod or monopod. It"s an extremely powerful telephoto zoom lens with the versatility that you need. This lens is great for the wildlife or nature photographer who wants to be hidden while taking photos of the subject. Advances in ultra high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings, along with the latest in computer-aided-design / computer-aided-manufacturing), are combined to produce lenses of unprecedented quality. Diamond-cut from crystal-clear, water-white optical glass, Opteka lenses are ground and polished to a precise precision. The included Opteka 2X Teleconverter effectivly doubles your zoom converting this lens to a 650-2600mm Super Telephoto! Specifications Zoom Type: Push/Pull (Two-touch) Focus Modes: Manual Focus Minimum Focus Distance: 16" (4.9 m) Angle of View: 3.8 to 2 Degrees Aperture: f/8-16 (f/16-32 with 2X) Filter Size: 95mm Max Diameter: 4.1" (105mm) Length: 18.5" (23.3" at full zoom) Weight: 4.4 lb (2 kg) Included Items ~ Opteka High Definition 650-1300mm Super Telephoto Zoom Lens ~ Opteka High Definition 2X Teleconverter ~ T-Mount Lens Adapter ~ Lens Hood ~ Padded Pouch with Shoulder Strap ~ Front and Rear Lens Caps