Sigma 50 120mm f2.8 Contemporary Sony E Category_Monopods achieving a compact and lightweight It gives you fast achieving a compact and lightweight design A new power zoom system driven by four XD (Extreme Dynamic) Linear Motors for the first time in an Alpha lens provides smooth control with the immediacy of manual zoom The large bokeh and compression effect of a telephoto lens equivalent to approximately 180mm in 35mm terms enable expression that ranges from portraiture that makes the subject stand out to flat product photography where perspective is kept in check three SLD glass elements and four aspherical elements in exactly the right arrangement achieves both high optical performance and compact dimensions