Sigma 28-200mm f/3.5-5.6 DG Macro is a compact, high zoom ratio lens designed for full-frame DSLRs. The 28-200mm is an ultra telephoto lens employed with multi-layer coating technology that minimizes flare and ghosting while ensuring precise color balance and high definition. The interal focusing prevent the filter threads from moving during focusing, thus allowing the use of special effect filters. Its aspherical glass elements ensure high contrast and edge-to-edge sharpness while correcting aberrations throughout the entire zoom range. The 28-300 compact size makes it portable for travel and other photography types.