This telephoto zoom lens is a perfect length for both portraits & wildlife! And being a FX (full frame) format, if you have, say, a Nikon D5300, D7200 or pretty well any Nikon DX sensor camera, it will have a maximum range of around 450 mm. The red line around the barrel indicates it's Sigma's APO family, with higher quality elements inside, including a macro switch. There are no unsightly scratches or fungus on this lens so it looks almost new! A bargain at a very reasonable price! More detailed specs are below: Telephoto Zoom Lens for DSLRs Shoot portraits, sports, nature Multi layer lens coating Filter Diameter: 58mm Design reduces ghost and flare Lens Construction: 14 Elements in 10 Groups Angle of View: 34.3 - 8.2 degrees Number of Diaphragm Blades: 9 Blades Minimum Aperture: F22 Minimum Focusing Distance: 150cm / (95cm Macro mode) Maximum Magnification: 1:4.1 / 1:2(Macro mode) Dimensions: Diameter 76.6mm X Length 122mm Weight: 550gm