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Sigma lens serial number11/9/2023 ![]() ![]() Sigma’s optical design consists of 15 elements in 13 groups with two Special Low Dispersion (SLD) glass elements and two hybrid aspherical lenses. It is not compatible with 35mm film or full-frame SLRs. Mounted on all but Canon DSLRs, the Sigma delivers a 35mm equivalent focal range of 27-300mm Canon DSLRs with their fractionally smaller sensors result in the Sigma delivering a 35mm equivalent range of 29-320mm. The lens is designed for digital SLRs with cropped sensors and is available in Canon, Nikon, Pentax and Sony Alpha (previously Konica Minolta) fits. Featuring coverage from wide-angle to decent telephoto, it’s ideal for a wide variety of situations – and for some photographers be the only lens they’ll ever need. Sigma’s 18-200mm F/3.5-6.3 DC was announced in February 2005 as an all-round 11.1x zoom lens.
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