Overview This multipurpose zoom lens offers Optical Stabilization (OS) and covers wide angle to telephoto to macro photography. It differs from Sigmas 18-250mm F3.5-6.3 DC OS HSM lens with its even more compact size, its macro capability with a maximum magnification ratio of 1:2.9 and the use of Thermally Stable Composite (TSC) material. TSC, which is incorporated into the lens barrel and is often compared to polycarbonate, has a high degree of elasticity and exhibits little variation in its structure in extreme temperature conditions. This means that internal barrel expansion and contraction due to extreme temperature variations is less prevalent. TSC also contributes to the lens size reduction. Sigmas unique OS system, as well as one Special Low Dispersion (SLD) glass and three aspherical lens glasses, compensate for camera shake and enable correction of color aberration, respectively. Key Features High performance & compact with great zoom ratio Made with Thermally Stable Composite material Optical Stabilizer (OS) Super Multi-Layer Coating to reduce flare and ghosting Hyper Sonic Motor (HSM) to ensure fast and quiet auto-focusing Double-sided aspherical lenses 13x high zoom ratio 62mm filter size Lens hood, front & rear cap