User manual SIGMA 485

[. . . ] This lens is an Equisolidangle Projection type fisheye lens which provides a 180 degree angle of view in any direction against the film plane. In order to get the maximum performance and enjoyment out of your Sigma lens, please read this instruction booklet thoroughly before you start to use the lens. DESCRIPTION OF THE PARTS (fig. 1) Adapter Ring Focus Ring Distance Scale Depth of Field Read Out Index Focus Index Line Filter Holder Focus Mode Switch (Sigma SA and Canon AF only) Mount Guide Plate NIKON AF TYPE CAMERAS This Lens functions same as a G Type (type without Aperture) auto-focus Nikon lens. Depending on the combination with camera some restrictions with its functions may result. [. . . ] If your camera has only an Evaluative Metering System, please switch to manual exposure mode and/or use a hand held exposure meter. FOCUSING Auto Focus When you use the AF lens with the AF camera body, Auto Focusing is possible. Select the autofocus mode on your camera body (set the focus mode switch on the lens to "AF" for Sigma SA and Canon AF lens). While auto focusing, please do not touch the focus ring around the lens. To avoid damaging AF mechanism, please do not turn the focus ring manually while in the autofocus mode. This lens has a very deep depth of field, despite its short focal length. Although your lens performs precise autofocusing, this feature might cause the lens' distance scale to show a different reading than the real subject - to - lens distance. When you focus manually with AF lens, select the manual focus mode on your camera body (set the focus mode switch on the lens to "M" for Sigma SA and Canon AF lens). The viewfinder of some Nikon AF cameras have indicators to display the focus status. The " " symbol indicates that correct focus has been set, " " indicates that focus is set in front of the subject, and "" indicates that focus is set behind the subject. When this AF lens is used with Nikon AF cameras in MF mode, please adjust the lens' focus until the " " symbol is visible. 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. Special allowance is made for this at the infinity setting. PREVENTION OF FLARE AND GHOST Because of the extremely wide angle of view of this lens, flare and ghosting may occur much more easily than with other lenses. When you take a picture with this lens, please pay special attention to flare and ghosting which can occur when shooting near or directly into the sun or other very bright lights. DEPTH OF FIELD SCALE The depth of field scale helps you to check the depth of field (the zone of sharpness) of your composition. For example in figure (3), the depth of field zone is shown when the aperture F5. 6 is used. INFRARED PHOTOGRAPHY When photographing using infrared film and infrared filters an adjustment to focus must be made. Turn the focus ring manually so that the distance scale marking that was previously aligned with the focus index mark is now aligned with the infrared guide mark "R". [. . . ] 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 Magnification Filter Size Dimensions Dia. ×Length Weight 6 ­ 11 180° 22 0. 135m (0. 443ft) 1:4. 6 73. 5×68. 6mm (2. 89×2. 7 in) 400g (14. 1 oz) Dimensions and weight include the SIGMA mount. The CE Mark is a Directive conformity mark of the European Community (EC). SIGMA (Deutschland) GmbH Carl-Zeiss-Str. 10/2, D-63322 Rödermark, F. R. GERMANY Verkauf: 01805-90 90 85-0 Service: 01805-90 90 85-85 Fax: 01805-90 90 85-35 [. . . ]