Tamron announces the 12-20mm F2.8, an ultra-wide zoom for full-frame Sony and Nikon

Tamron has announced the 12-20mm F2.8 (Model A084), an ultra-wide-angle zoom for full-frame Sony E and Nikon Z mirrorless cameras that holds a constant f/2.8 aperture across its range. The headline is that 12mm wide end: where most ultra-wides start at 14mm or 16mm, Tamron pushes to a genuinely dramatic 12mm, and pairs it with a bright maximum aperture throughout. It’s aimed at landscapes, architecture, interiors, travel and, notably, astrophotography. Full details are on the Tamron product page and in the official press release. That combination of 12mm reach and a constant f/2.8 is exactly what makes this lens interesting to us. For night skies and dimly lit interiors, the extra stop over the f/4 zooms is meaningful, and the expansive 12mm perspective gives a sense of scale that 14mm simply can’t. Tamron has clearly built with astro in mind: the optical formula uses one XGM and three GM aspherical...