Tamron 17-28mm f/2.8 RXD Di III

A wide-angle zoom with a constant high aperture of f/2.8 throughout the zoom range, designed specifically for Sony's full-frame guard of mirrorless cameras. First of all, the model is in demand for shooting landscapes, interiors and architecture. It was released as an alternative to the popular "wide-angle" with a set of focal lengths of 16-35 mm. The Tamron 17-28mm f/2.8 Di III RXD uses a 13-element optical design under an 11-group wing.

It also uses two aspherical lenses (molded and hybrid), extra-low dispersion (XLD) and low dispersion (LD) elements to reduce chromatic aberration. The proprietary BBAR element coating serves to suppress glare, including under backlighting. The aperture of the model is 9-bladed, which is the key to obtaining spectacular bokeh. When focus, the lens relies on an RXD stepper motor to ensure fast and quiet autofocus performance for stills and video. Together with the model, you can use filters in the amount of 67 mm. For the zoom lens, dust and water protection of the body is claimed.