[. . . ] Please read these instructions before using the Sigma APO Tele Converter EX DG. Your camera’s instruction booklet also contains pertinent information about using lenses. 4x EX DG and Sigma APO Tele Converter 2x EX DG are dedicated Tele Converter lenses, which should be used only with lenses listed in [Table 1]. [. . . ] 4x EX or APO Tele Converter 2x EX to a lens that is not listed in [Table 1], it may damage the Tele Converter as well as the master lens. Jp/english Usable range of focal length or AF working distance varies depending on the camera in use. pENTAX AF mount Tele Converter does not support PENTAX SF series cameras. When the APO Tele Converter EX DG is attached to the camera body it will automatically function in the same way as the master lens. Please refer to the instruction booklet for your camera body for details. If using a lens with a SONY and attaching the APO Tele Converter EX DG to the camera body first, it may cause the AF mechanism to run idle. FOCUSING The lenses marked “AF” in [Table 1] will retain auto focus operation when used with a tele converter. 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. 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 on the surface of the lens. 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. [. . . ] Sudden temperature changes may cause condensation or fog to appear on the surface of the lens. 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. 5mm (diametro lunghezza) Peso 160g Dimensions and weight include the SIGMA mount. [. . . ]