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Sigma introduces the APO 120-300mm F2.8 EX DG OS HSM large aperture zoom lens that features an Optical Stabilizer function and weather-resistant design allows for use in harsh conditions. The addition of an APO Tele Converter produces an ultra telephoto zoom lens with AF. Sigma also introduces the APO MACRO 150mm F2.8 EX DG OS HSM, a large aperture macro lens with Optical Stabilizer too. The new Electronic Flash EF-610 DG Super and ST complete these product announcements, all on display at Photokina...
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