The Sigma 135-400mm f4.5-f5.6 APO aspherical lens lets you capture an unprecedented range of images, everything from landscapes to sports. This lens uses Sigma's exclusive five-group zoom system combined with aspherical lens elements to achieve sharp, high-contrast photographic results across the entire zoom range. The lens' optics also use special low dispersion glass elements that help eliminate the secondary spectra effect normally associated with telephoto lenses. The front lens group does not rotate thanks to Sigma's rear focus system, making polarizing filters extremely easy to use. For added convenience, the 135-400mm f4.5-f5.6 APO aspherical lens includes a built-in rotary tripod mount that eliminates vibration, and consequently blurry images, during shutter release. This model is dedicated to Nikon AF SLR cameras.
