User manual SIGMA 17-50MM F2.8 EX DC OS HSM

[. . . ] If such an element is used vignetting will occur on the picture surface. If you use SD1 digital camera, corresponding angle of view will be 25. If you use SD15, SD14, SD10 or SD9 digital camera, corresponding angle of view will be 29-85mm. [. . . ] 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 contact. 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 17mm and set the zoom lock switch to the “LOCK” position. Using the Optical Stabilizer function it is possible to get sharp results at shutter speeds approximately 4 stops slower than you could without using the OS function. 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 from the time of depressing the shutter button halfway). Sony and Pentax fittings are not equipped with the Optical Stabilizer (OS) function. Do not use the Optical Stabilizer in the following situations: When the lens is mounted on a tripod. If you are not using OS, please turn OFF the OS switch, in order to prevent unnecessary battery consumption. Be sure to turn the OS switch to the OFF position before attaching or detaching the lens to the camera. The OS 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 as this could damage the lens. Although the viewfinder image may appear to shake immediately after shooting and/or at the start of the flash charge cycle of the camera’s built-in flash, it will not cause any effect to the pictures. LENS HOOD 4 A bayonet type detachable hood is provided with the lens. This lens hood helps to prevent flare and ghosted images caused by bright illumination from outside the picture area. 4) When taking photographs using the built-in flash, it is advisable to remove the lens hood so as to avoid cutting off any of the flash output, which could cause a shadow in the picture. [. . . ] The glass materials used in the lens do not contain environmentally hazardous lead and arsenic. For at undgå beskadigelse af objektivet, sørg da for at placere det med fronten nedad ved objektivskift. Vid objektivbyte, se till att objektivets front hålls nedåt för att undvika att objektivet skadas. [. . . ]