Create Sharp High Quality Images, Comes with Lens Pouch and Protective Caps. Multi coated low-dispersion glass, anti-reflection coating, manual focus telephoto zoom lens to use with DSLR SLR cameras. ADVANCED OPTICS / SUPER ZOOM / SOLID FULL METAL CONSTRUCTION / MANUAL FOCUSING 500-1000mm F/8.3 Telephoto Lens FULL MANUAL LENS, no electric contacts→no auto focus→no image stabilization, require more exprerience with Manual Exposure. NOTE: This is a manual lens, NO Electronic Contacts, your camera will not detect the lens when mounted, that's why it shows not connecting properly, please switch to MF MODE in order to use this lens correctly. Tips to use our Manual Lens: 1) Set the mode dial to Manual (M). 2) Set the Release w/o Lens option in the camera menu to Enable. 3) Set the Shutter lock option in the camera menu to Off: no lens. Super 500mm achromatic refractor telephoto lens | High index, low-dispersion multi-coated HD optical glass to reduce flare 2x Teleconverter doubles the power of your lens to 1000mm.Built-in tripod mount and removable lens hood helps reduce stray light to prevent lens flare and ghosting .All-metal body and mount