User manual SIGMA 686

[. . . ] If such an element is used vignetting will occur on the picture surface. If you use SD14 or SD10 or SD9 digital camera, corresponding angle of view will be 85 - 340 mm . ATTACHING TO CAMERA BODY When this lens is attached to the camera body it will automatically function in the same way as your normal lens. On the lens mount surface, there are a number of couplers and electrical contacts. [. . . ] When using the OS function, please turn off the optical stabilizer function of the camera body and set the OS switch of the lens to ON. When using the camera's optical stabilizer function, please set the OS switch of the lens to OFF and turn the camera's optical stabilizer function on. Do not use the Optical Stabilizer in the following situations: LENS HOOD 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. (fig. 3) 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. 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. The stabilizer unit will be placed to a specific position in the lens body and then shooting will be possible (stabilizer unit will switch to active status) regardless of the OS Switch position. The active status will take approximately a minute from turning the camera on or depressing the shutter button "half-way". The image in the viewfinder looks like it is vibrating after the camera is turned on or turned off. If you fix the camera with the tripod or another method, please determine the composition when the stabilize unit is in the active status. The composition seen through the viewfinder will be different depending on the power status of the camera. If the active status is cancelled, please press the shutter button "half-way". FILTER Only one filter should be used at the time. Two or more filters and/or special thicker filters, like a polarizing filter, may cause vignetting. When using a polarizing filter with AF camera, use the "circular" type. BASIC CARE AND STORAGE Avoid any shocks or exposure to extreme high or low temperatures or to humidity. SETTING THE EXPOSURE MODE The sigma lens functions automatically after mounting to your camera. Please, refer to the camera instruction book. For extended storage, choose a cool and dry place, preferably with FOCUSING AND ZOOMING For autofocus operation, set the focus mode switch on the lens to "AF" position. If you wish to focus manually, set the focus mode switch on the lens to the "MF" position. [. . . ] 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. TECHNICAL SPECIFICATIONS Lens construction Angle of View Minimum Aperture Minimum Focusing Distance 10 - 14 27. 9 - 7. 1° 22 1. 1m (3. 61ft) Magnification Filter Size Dimensions Dia. ×Length Weight 1:4. 5 55mm 74. 4 x 102. 2mm (2. 93 x 4. 02 in) 420g (14. 8 oz) ABOUT OS (OPTICAL STABILIZER) FEATURES This OS lens effectively compensates for image blurring caused by camera shake. 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. [. . . ]