The Tamron 17-70mm f/2.8 Di III-A VC RXD is the brightest standard zoom lens for Sony's APS-C system. With a constant f/2.8 aperture (equivalent to 25.5-105mm), it guarantees high image quality and excellent bokeh in every situation. Equipped with VC stabilization and the fast, silent RXD motor, it is the ideal choice for videographers and photographers seeking maximum sharpness in a robust and weather-sealed body.