The Tamron 17-70mm f/2.8 Di III-A VC RXD is a 25.5-105mm-equivalent lens for APS-C-format mirrorless cameras, with a variable zoom range and a brilliant design. The wide-to-short-tele range is great for everyday shooting, and the fast f/2.8 constant maximum aperture is ideal for working in low-light situations and provides better depth-of-field control. A set of specialized optics, including aspherical and low dispersion components, complement this design, resulting in well-corrected imagery with exceptional sharpness, clarity, and color accuracy. Tamron's BBAR coating lowers flare and ghosting for enhanced contrast when operating in backlighting and harsh lighting environments.