User manual SIGMA 477

[. . . ] In order to get the maximum performance and enjoyment out of your Sigma lens, please read this instruction booklet thoroughly before you start to use the lens. When operating this lens in manual focus mode, it is recommended that correct focus be confirmed visually in the viewfinder rather than relying on the distance scale. This is due to possible focus shift resulting from extreme changes in temperature which cause various components in the lens to expand and contract. [. . . ] If such an element is used vignetting will occur on the picture surface. FILTER Filters cannot be mounted on the front of the lens. Please cut the gelatin filter, using the guide plate accessory as a pattern, and insert the filter into the filter holder at the rear of the lens. (fig. 3) ATTACHING TO CAMERA BODY When this lens is attached to the camera body it will automatically function in the same way as your normal lens. Please refer to the instruction booklet for your camera body. On the lens mount surface, there are a number of couplers and BASIC CARE AND STORAGE Avoid any shocks or exposure to extreme high or low temperatures or to humidity. For extended storage, choose a cool and dry place, preferably with electrical contacts. To avoid damaging the lens, be especially sure to place the lens with its front end down while changing the lens. When you take a picture, please remove the lens cap and the adapter good ventilation. To avoid damage to the lens coating, keep away from mothballs or naphthalene gas. Do not use thinner, benzine or other organic cleaning agents to remove ring (fig. 1-) not just the lens cap, to avoid vignetting. SETTING THE EXPOSURE MODE The sigma lens functions automatically after mounting to your camera. Please, refer to the camera instruction book. dirt or finger prints from the lens elements. Clean by using a soft, moistened lens cloth or lens tissue. This lens is not waterproof. When you use the lens in the rain or near water, keep it from getting wet. It is often impractical to repair the internal mechanism, lens elements and electric components damaged by water. Sudden temperature changes may cause condensation or fog to appear FOCUSING This lens features Sigma's built-in Hyper Sonic Motor (HSM). [. . . ] When entering a warm room from the cold outdoors, it is advisable to keep the lens in the case until the temperature of the lens approaches room temperature. TECHNICAL SPECIFICATIONS Lens construction Angle of View Minimum Aperture Minimum Focusing Distance Magnification Dimensions Dia. ×Length Weight 7 ­ 12 154°(for SIGMA) 167°(for CANON) 180°(for NIKON / SONY / PENTAX) 22 13. 5cm (0. 44 ft) 1:3. 3 75. 8×83. 1mm (2. 98×3. 27 in) 475g (16. 8 oz) Dimensions and weight include the SIGMA mount. camera's focusing mode. For Nikon, Pentax and Sony mounts, it is only possible to use AF with camera bodies which support motors driven by ultrasonic waves such as HSM. AF will not function if the camera body does not support this type of motor. This lens also permits manual focusing even in the autofocus mode. With the camera set to the One-Shot AF (AF-S) mode, it is possible to manually override the autofocus while the shutter release button is pressed halfway. [. . . ]