User manual SIGMA 270

[. . . ] 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) Filter Attachment Thread Focus Ring Distance Scale Depth of Field Read Out Index Focus Limiter Focus Index Line Focus Mode Switch (Sigma SA and Canon AF only) Mount Lens Hood 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. For more details, please refer to instruction manual of the camera in use etc. PENTAX AF TYPE CAMERAS This Lens functions same as a FAJ Type (type without Aperture) auto-focus Pentax 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. FOCUS LIMITER SWITCH This lens has a Focus Limiter switch (fig. 2). When the Limiter is set at "FULL" position, the focus ring can turn between the minimum focusing distance and the infinity position. When the Limiter is set at "LIMIT" position, the focus ring can turn either at "close range" (between minimum distance and 0. 48m) or at "normal range" (between 0. 55m and infinity). MAGNIFICATION The indication of the lens as "1:xx" on a focusing distance scale represent the magnification (commonly called the reproduction ratio). For example when you are in focus at the "1:1. 5" position on the scale, a subject with an actual size of 1. 5cm will have an image size of 1cm on the firm. (fig. 3) EXPOSURE COMPENSATION The F-number of the macro lens changes when focusing due to the extension of the lens barrel and SLR type camera body automatically compensates it. When you use an external light meter or a non-TTL type flash unit, you need to make exposure compensation at close distance. (tab. 6) 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. 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. DEPTH OF FIELD SCALE The depth of field scale helps you to check the depth of field (the zone of sharpness) of your composition. [. . . ] 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 9 ­ 10 34. 3° 22 0. 257m (0. 843ft) 1:1 62mm 76×95mm (2. 99×3. 74 in) 525g (18. 5 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 (tab. 6) Magnification 1:5 1:3 1:2 1 : 1. 5 1 : 1. 3 1 : 1. 1 1:1 Distance 0. 489m 0. 360m 0. 301m 0. 275m 0. 267m 0. 260m 0. 257m F-No. F3. 3 F3. 6 F3. 9 F4. 2 F4. 5 F4. 8 F5. 0 Compensation + 0. 4EV + 0. 7EV + 0. 9EV + 1. 2EV + 1. 3EV + 1. 5EV + 1. 6EV [. . . ]