BlueTech 650-1300mm f/8-16 Manual Focus Telephoto Zoom Lens (Black) For Nikon D3000, D3100, D3200, D3300, D5000, D5100, D5200, D5300, D5500, D7000, D7100, D7200, DF, D3, D3S, D3X, D4, D40, D40x, D50, D60, D70, D70s, D80, D90, D100, D200, D300, D600, D610, D700, D750, D800, D800E, D810 Digital SLR Camera

This extreme: 650-1300mm f/8-16 Manual Focus Lens is an economical way to achieve some ultra-telephoto photography, all the way up to 1300mm----This is a T-mount lens, which means that aperture is not communicated to or controlled by the camera body, and as such must be used only in aperture-priority autoexposure mode (if your camera has it) or in the manual exposure mode -----It will work on both "full frame" digital cameras as well as the smaller-format APS-C (15 x 22mm) cameras, but has only one effective aperture at any focal length, which varies from f/8.0 at 650mm to f/16.0 at 1300mm. That's not much of a hindrance, however, as you'd likely use this lens at its relatively small maximum aperture in any case. This lens requires bright light and a high ISO setting on the camera to get a fast shutter speed (or fast film in a film camera), and needs a sturdy tripod or monopod, but can deliver very sharp results if used properly.-----The lens features an incredible zoom range.-----This lens has a two-touch zoom/focusing system.-----There is a push-pull ring for zooming, and another ring for focusing.-----Multi-coated elements reduce flare and increase light transmission. -----The aperture is fixed-position, but only varies based on focal length. ----The lens has a tripod mount upon its lens barrel.