A fast standard zoom for Sony E-mount APS-C bodies, covering a 25.5-105mm full-frame equivalent range at a constant f/2.8. It is the first 17-70mm f/2.8 zoom for APS-C mirrorless, and it adds Tamron's VC stabilization with AI-assisted correction for video. It suits travel, event and everyday shooters who want one bright lens instead of a kit zoom plus primes. Against Sony's 16-55mm f/2.8 G it reaches longer and adds stabilization, while the Sony is smaller and has no VC.
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Owners and reviewers treat it as one of the best value fast standard zooms for Sony APS-C, praising sharpness, the useful range and the stabilization. Complaints center on size and weight next to kit lenses and on edge sharpness wide open.
The Tamron 17-70mm F2.8 Di III-A2 VC RXD (Model B070) is a standard zoom lens for Sony E-mount APS-C mirrorless cameras. Its focal length range is 17-70mm, equivalent to 25.5-105mm on a full-frame camera, a 4.1x zoom ratio. It keeps a maximum aperture of F2.8 across the whole zoom range, so the lens does not get darker as you zoom.
The lens has Tamron's proprietary VC (Vibration Compensation). When shooting video, AI technology improves image stabilization compared to conventional models. It is designed specifically for APS-C mirrorless cameras and is light and compact even with VC.
The F2.8 aperture helps in lower light. It also gives more control over depth of field, such as blurring the background behind a portrait subject. The minimum object distance is 0.19 m (7.5 in) at the wide-angle end and 0.39 m (15.4 in) at the telephoto end.
