After you buy a digital single lens reflex camera, the first camera accessory you would want to buy is a compatible lens for the camera. A telephoto zoom lens is a perfect camera accessory to buy which serves most of your photographic requirements. The Sigma 70-300mm F/4-5.6 APO DG Macro lens is a telephoto zoom lens that is suitable for both amateurs and professionals. This lens is ideal for portrait photography. The construction of the Sigma macro lens is made using 14 elements in 10 groups. The number of diaphragm blades in the Sigma lens is 9 to achieve top quality pictures. The minimum angle of view of the Sigma macro lens is 8.2° and the maximum angle of view is 34.3° to give you optimal photographic results. The Sigma 70-300mm F/4-5.6 APO DG Macro lens is especially designed for motorized Canon digital single lens reflex cameras. Performance The Sigma lens features a maximum focal length of 300 mm and a minimum focal length of 70 mm. The minimum aperture of the Sigma 70-300mm F/4-5.6 APO DG Macro lens is F/22 - 32. The aperture of the Sigma telephoto zoom lens with the maximum focal length is 5.6 and the aperture with the minimum focal length is 4. An aperture is a thin diaphragm in the lens which opens and closes frequently allowing light to pass through to hit the camera sensor. When the light hits the sensor, it helps you to produce photographs. You can do sports and wildlife photography with the compactly designed Sigma 70-300mm F/4-5.6 APO DG Macro lens. The Sigma telephoto zoom lens measures 76.6 mm x 119.5 mm in diameter and length. The length of the lens when extended completely is 208.3 mm. The Sigma lens weighs just 530 g which enables easy portability. The size and weight of the lens together allow you to comfortably fit the lens in your camera bag making space to accommodate other camera accessories. Features The maximum magnification of the Sigma macro lens is 1: 4 x to closely follow the expressions of your loved ones and capture them. The filter attachment size of the Sigma 70-300mm F/4-5.6 APO DG Macro lens is 58 mm. This attachment is the extreme front end of the lens where you can attach different kind of filters available in the market. You can create your own scene with the suitable filter according to your requirements. For instance, you can use a blue filter to reduce the effect of a harsh sunlight. The APO and DG in the Sigma lens stand for apochromatic and digital. The closest focusing distance of the Sigma telephoto zoom lens is 1.5 m by which you can fill your frame with subjects and follow them carefully and closely. The Sigma 70-300mm F/4-5.6 APO DG Macro lens is an appropriate choice to capture scenic landscapes and even groups of flowers in detail.