Top features: - Versatile prime lens for macro and portraiture - Special elements help reduce distortion - Image stabilisation is ideal for handheld shooting - Floating inner focusing minimises aberrations - Fast and quiet autofocus with Hyper Sonic Motor Versatile prime lensThe Sigma 105 mm f/2.8 EX Macro DG HSM lets you capture macro shots of subjects, such as flowers and insects, while maintaining an appropriate distance - without the lens casting a shadow.Special elementsHigh refractive index SLD (Special Low Dispersion) glass helps correct distortion, including chromatic and spherical aberration as well as field curvature.A Super Multi-Layer Coating minimises flare and ghosting for high quality, high contrast images.Image stabilisationSigma's OS (Optical Stabiliser) system corrects to approximately 4 stops, helping minimise camera shake when shooting handheld.Floating inner focusingA floating inner focusing system moves two lens groups separately, to help minimise aberrations and enable stable rendering of the image from infinity to 1:1 magnification.Fast and quiet autofocusSigma's HSM (Hyper Sonic Motor) delivers fast and quiet autofocusing, which is ideal when shooting insects or animals, or filming video.The lens also features full-time manual focus so you can override the AF for quickly getting the shot without switching modes.