Top features: – Ideal for longer working distances when you need to focus in close – SLD (Special Low Dispersion) glass elements provide correction of various aberrations – OS (Optical Stabiliser) function offers the use of slower shutter speeds Ideal for longer working distancesOffering a longer working distance than traditional macro lenses, the Sigma 150 mm f/2.8 EX DG OS HSM APO Macro Lens allows you to take pictures of small animals or insects with ease. For added versatility, the lens can be used as a normal telephoto lens.A floating inner focusing system moves two different lens groups in the optical path to different positions, providing a high optical performance from infinity to 1:1 macro. The lens uses a Hyper Sonic Motor to ensure high speed and quiet AF whilst also offering full time manual focus for added control.For professional quality images, the lens has a rounded nine blade diaphragm which helps to create an appealing blurred effect with the out of focus area of the image.SLD (Special Low Dispersion) glass elementsYou can enjoy superior images quality while using the 150 mm f/2.8 APO EX DG HSM as it features three SLD (Special Low Dispersion) glass elements. These provide correction for various aberrations, offer impressive peripheral brightness and corrects distortion.Flare and ghosting is reduced by the Super Multi-Layer Coating, providing sharp and high contrast images even at the maximum aperture.OS (Optical Stabiliser) functionHandheld photography is made easier with Sigma’s OS (Optical Stabiliser) function. This offers the use of slower shutter speeds, enabling handheld macro photography. By compensating for camera shake, you can enjoy a stable image in the view finder to ensure easier framing when shooting by hand.