A Fully Multi-Coated (Every Element) Low Dispersion Glass Capable Of Producing Sharp, High Definition Images <> Anti-reflection Coating This Lens Features An Incredible Zoom Range <> The Lens Has A Tripod Mount Upon Its Lens Barrel. This Lens Has A Two-Touch Zoom/Focusing System. There Is A Push-Pull Ring For Zooming, And Another Ring For Focusing. Designed To Maximize Day And Night Shots By Providing Maximum Light And Image Transmission <> Includes Deluxe Padded Lens Case A T Mount Adapter Is Required To Attach This Lens (Sold Separately) The Polaroid 650-1300mm f/8-16 Manual Focus Lens is an extreme HD zoom lens which offers an economical introduction to extreme ultra-telephoto photography, allowing you to go all the way to 1300mm and is perfect for the professional and amateur photographer alike. The lens features a 650-1300mm zoom range, but has only one effective aperture at any focal length, which progresses from f/8 at 650mm to f/16 at 1300mm. There is a built-in, rotating tripod mount for easily attaching to your tripod or monopod. This is a T-mount lens, which means that aperture is not communicated to or controlled by the camera body. There are T-mounts available from Polaroid for every DSLR system. Polaroid DNA is optics and lenses (as in Polarizing filters) , this Polaroid Lens is computer designed using a combination of lenticular light refraction and reflection optics - the same physics used in many professional telescopes. Combined with advanced manufacturing techniques and multi coated layers, the result is a lens with a sharp picture quality with less color aberration which is considered the most harmful factor in the field of telephoto photography. This lens is a highly complex, precision made optical instrument. Is has been individually assembled by skilled craftsman. With proper care and maintenance this lens will give you years of satisfying photographic results Specification: Zoom Type: Push/Pull (Two-touch) Focus Modes: Manual Focus Minimum Focus: 16' (5m) Maximum Focus: Infinity Focal Length:650-1300mm Elements/Groups: 8/5 Angle of View: 3.8 to 2 Degrees Aperture: f/8-16 Coatings: Multi Filter Size: 95mm Max Diameter: 4.1" (105mm) Camera mount Type: T mount Length: 18.5" (23.3" at full zoom) Weight: 4.4 lb (2 kg) Contents: Zoom Lens, Front and Rear Lens Caps, Zippered Storage Bag with Sling, Attached tripod mount, Specification, Care And Use Sheet