The Sigma 24-60mm f/2.8 lens is a compact lens that is perfect for everyday use. This lens offers Special Low Dispersion (SLD) as well as aspherical glass elements, making it a superior quality lens to others in its class. With the added benefits of Internal Focusing (IF), this lens is a quality, high-performing lens that is perfect for any type of photoshoot. With DG lens coating, the appearance of ghosting and flare are reduced drastically. The Zoom Lock will eliminate any zoom movement, making this the perfect lens to use for sports photography.