The Sigma 50 to 500 mm F4.5-6.3 APO DG OS for Sigma is a high quality lens that is ideal for professional photography, including wildlife photography and landscape photography. The 10x power high-performance zoom lens covers standard to high telephoto range. Equipped with optical stabilization feature, it compensates for the camera shake to produce perfect still images. The four SLD lens elements are perfectly placed to provide optimum color correction and sharpness. The special multi-layer coating helps in eliminating the flare and ghosting to provide high quality images even in bright sunlight. In addition to this, the front and rear lens caps come handy to prevent dirt and moisture from entering the lens.