Introduction
The Tokina Opera 16-28mm F2.8 FF is a new ultra-wide-angle zoom lens for full-frame Canon and Nikon DSLR cameras with a constant maximum aperture of f/2.8 available throughout the focal range. It offers the equivalent angle of view as a 25.6-44.8mm lens on an APS-C system camera body (depending on the exact crop factor).
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