The 1/3 20-100 mm aspherical vari-focal lens from Tamron USA Inc. is a telephoto lens for CCTV and security surveillance. For use with 1/3-in. CCD cameras, the lens has a f/1.6 aperture. In addition, the lens covers an angle of 13.6 deg. by 10.2 deg. at its 20 mm setting and 2.8 deg. by 2.1 deg. at its 100 mm setting. Tamron

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