User manual SIGMA 728

[. . . ] Optical Stabilizer feature can work with the Nikon AF cameras shown in the following table. When using this lens with other camera models not listed in the following table, please set the OS Switch to OFF position to cancel the Optical Stabilizer function. Digital SLR Cameras and F6, F5, F100, F80/N80, U (F65/N65), U2 (F75/N75) From our homepage, you can check the latest information regarding the camera models, which can be used with Optical Stabilizer function. DESCRIPTION OF THE PARTS (fig. 1) Filter Attachment Thread Focus Ring Distance Scale Focus Index Line Zoom Lock Switch Zoom Ring OS Switch Focus Mode Switch (except Pentax AF and SONY mount) Mount Lens Hood Tripod Socket NIKON AF TYPE CAMERAS This lens functions in the same way as a G Type auto-focus Nikon lens (without an aperture ring). Functions may be restricted depending on the lens/camera combination. [. . . ] The HSM enables quick and quiet autofocusing. SIGMA AF and CANON AF For autofocus operation, set the focus mode switch on the lens to the "AF" position (fig. 2). If you wish to focus manually, set the focus mode switch on the lens to the "M" position. You can adjust the focus by turning the focus ring. NIKON AF, PENTAX AF, and SONY For autofocus operation, set the camera to AF mode and set the focus mode switch on the lens to the "AF" position (fig. 2). If you wish to focus manually, set the focus mode switch on the lens to the "M" position. You can adjust the focus by turning the focus ring. Please refer to camera's instruction manual for details on changing the 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. 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. SHOULDER STRAP Please attach the shoulder strap to the sling as described in figure 8. 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. ABOUT TELE CONVERTERS The lens can be used with Sigma's 1. 4x EX or 2. 0x EX Apo Tele Converters (optional), becoming a 168-560mm F6. 3-8 telephoto zoom lens or a 240-800mm F9-11 telephoto zoom lens respectively both can be used in manual focus only. Do not use other manufacturers' teleconverter's, only those listed above are compatible. The Pentax mount Tele Converter is not compatible with this particular lens. We recommend the DG APO Tele-Converters when using with DSLR cameras. ZOOM LOCK SWITCH This lens is also equipped with Zoom Lock Switch to eliminate the zoom creep when the lens is tilted down. Please set zooming ring to 120mm and set the zoom lock switch to the "LOCK" position, (fig. 3), however, please slide the lens to the "UNLOCK" position from "LOCK" position, before taking the picture. 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. [. . . ] When using a polarizing filter with an AF camera, use the "circular" type. 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 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 dirt or finger prints from the lens elements. Clean by using a soft, moistened lens cloth or lens tissue. [. . . ]