Capture images magnified up to 16x that of a standard 50mm lens with the Vivitar 420-800mm f/8.3 Manual Focus Telephoto Zoom Lens (requires camera-specific T-Mount adapter) mounted to your favorite camera. This entry-level manual focus push/pull zoom lens is manufactured with multi-coated all-glass elements and a screw-in lens hood for superior contrast and resolution, with an aluminum alloy body that is surprisingly lightweight and compact. With macro focusing even at 800mm down to a remarkable 5.25 feet, it can also be used reveal details and textures of small subjects. This powerful zoom offers all the versatility you need for wildlife, sports, nature and surveillance photography at a remarkably low cost. Key Features: Images magnified up to 16x that of a standard 50mm lens Multi-coated all-glass elements Screw-in lens hood Built-in tripod collar Lightweight aluminum alloy body Macro focusing even at 800mm down to 5.25 feet For DSLR / Mirrorless cameras using a camera-specific T-Mount adapter (sold separately) Versatile enough for use with wildlife, sports, nature and surveillance photography Attaching a T-Mount lens to your camera: 1) After removing the rear lens cap from your lens, connect the T-Mount adapter (not included) to the lens's rear thread and screw it on rotating it clockwise until snug. 2) Attach the lens with T-Mount adapter to the camera as if was a standard lens. Make sure the connection is locked properly. How to use a T-Mount lens: 1) Turn your camera on and switch it to Manual Mode. 2) Remove lens cap. 3) Make the necessary lens and camera adjustments to optimize settings.