User manual SIGMA 579

[. . . ] For more details, please refer to the camera's instruction manual. ATTACHING TO CAMERA BODY When this lens is attached to the camera body it will automatically function in the same way as the camera manufacturer's lens. Please refer to the instruction booklet for your camera body. On the lens mount surface, there are a number of couplers and electrical contacts. [. . . ] The " " symbol indicates that correct focus has been set, " " indicates that focus is set in front of the subject, and "" indicates that focus is set behind the subject. When this AF lens is used with Nikon AF cameras in MF mode, please adjust the lens' focus until the " " symbol is visible. 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. Special allowance is made for this at the infinity setting. Zooming Rotate the Rubber grip on the zoom ring to the desired position. TRIPOD SOCKET AND COLLAR This lens has a detachable tripod socket. When the locking knob on the collar is loosened, the lens and camera can rotate freely to easily position the camera horizontally or vertically (fig. To remove the tripod collar from the lens, first loosen and then disengage the locking knob. 4) FLASH PHOTOGRAPHY The camera's built-in flash will cause barrel shadow if used with this lens. For best results, please only use an external flash unit. DEPTH OF FIELD SCALE The depth of field scale helps you to check the depth of field (the zone of sharpness) of your composition. For example in figure (5), the depth of field zone is shown when the aperture F16 is used. The depth of field scale can be used at a focal length of 70mm only. ABOUT TELE CONVERTERS The lens can be used with Sigma's 1. 4x EX or 2. 0x EX Apo Tele Converters (optional), becoming a 98-280mmF4 Autofocus telephoto zoom lens or a 140-400mm F5. 6 Autofocus telephoto zoom lens respectively. Do not use other manufacturers' teleconverter's, only those listed above are compatible. We recommend the DG APO Tele-Converters when using with DSLR cameras. LENS HOOD A bayonet type detachable `hood is provided with the lens. This lens hood helps to prevent flare and ghosted images caused by extraneous light. Attach the hood and turn clockwise until it stops rotating. [. . . ] When using the lens in the rain or near water, prevent 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 on the surface of the lens. [. . . ]