User manual SIGMA APO 50–500MM F4.5–6.3 DG OS HSM

[. . . ] This is due to possible focus shift resulting from extreme changes in temperature which cause various components in the lens to expand and contract. Zooming Rotate the Rubber grip on the zoom ring to the desired position. 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. [. . . ] Press the shutter button halfway down, confirm the image in the viewfinder is stable then take the picture. (It takes approximately 1 second to produce a stable image, after pressing the shutter button halfway). The blurring compensation function of Optical Stabilizer is effective for hand-held shooting. In the following conditions, Optical Stabilizer may not function properly. Shots from the a moving vehicle If there is a considerable camera motion or shake. If you are not using Optical Stabilizer, please turn OFF the OS switch, in order to prevent consumption of a battery. Be sure to turn of OS switch to OFF position, before attaching or detaching the lens to the camera. The Optical Stabilizer continues to operate after you release your finger from the shutter button, as long as the exposure meter displays the exposure value. Never remove the lens or remove the camera’s battery while the image stabilizer is operating, you could damage the lens. Although the viewfinder image may appear to shake immediately after shooting and at the start of the flash charge cycle of the built-in flash of the camera etc. 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. It is possible to use auto focus in Live View if the camera is in “contrast detect” AF mode. 10) 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. 9) In order to place the lens and hood into the storage case, you must first remove the hood, then replace it on the lens in the reverse position. Two or more filters and/or special, thicker filters, such as a polarizing filter, may cause vignetting. 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. 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. [. . . ]