The new 17-70mm f/2.8 is Tamron's first high-speed zoom lens for mirrorless cameras with APS-C size sensors. It features a maximum aperture of f/2.8 across the entire 4.1x zoom ratio covering a focal length of 17-70mm (a full-frame equivalent of 25.5-105mm) ideal for everyday use, and superb optical performance. It is a small, lightweight lens that is also equipped with Tamron's VC (Vibration Compensation) mechanism to minimize camera shake. This VC mechanism leverages AI technology when shooting video. 

World’s First High-Speed Standard Zoom Lens for APS-C Cameras with Focal Length Range of 17-70mm 4.1x Zoom Ratio

The Model B070 has a focal length range of 17-70mm, equivalent to 25.5-105mm on full-frame cameras. It is the first F2.8 high-speed zoom lens in the world for APS-C mirrorless cameras to achieve a 4.1x zoom ratio.

Outstanding Optical Performance

The optical construction of the 17-70mm f/2.8 features 16 elements in 12 groups. Two GM (Glass Molded Aspherical) lens elements and one hybrid aspherical lens element are precisely arranged to maintain high-resolution performance from edge to edge. 

Upgraded VC Effective in Combination with Sony APS-C Mirrorless Cameras, Leveraging AI for Video Shooting

The 17-70mm f/2.8 features Tamron's proprietary VC mechanism. Additional sophisticated algorithms optimized for this model and a dedicated, independently operating MPU all combine to superbly compensate for vibration. This feature is available when the lens is used with cameras with or without in-body image stabilization. When shooting video, by leveraging AI technology, image stabilization performance improves compared to conventional models.

Close Focusing−MOD is Just 7.5-inch at the Wide-Angle End

The 17-70mm f/2.8 zoom focuses close, down to 7.5-inch MOD (Minimum Object Distance). This is far superior to the performance achieved by conventional high-speed zoom lenses for APS-C cameras. In addition, the 15.4-inch MOD at the 70mm telephoto end ensures good close-range shooting performance allowing photographers to enjoy compelling close-up shots.

A Highly Portable Compact Design

The 17-70mm f/2.8 zoom measures a scant 4.7-inch in length and 74.6mm in maximum diameter and weighs only 18.5 oz. The lens also maintains the same small 67mm filter size of each lens in the Tamron mirrorless lens line-up. This is remarkable for a lens with built-in VC image stabilization. When used with Sony's APS-C mirrorless cameras, this zoom is nicely balanced and provides a comfortable user experience.

High Performance Autofocus System Means You'll Own Every Shooting Opportunity

The AF drive on the 17-70mm f/2.8 includes an RXD (Rapid eXtra-silent stepping Drive) stepping motor unit to help you stay focused on the action. RXD uses an actuator to precisely control the rotational angle of the motor, allowing it to directly drive the focusing lens without passing through a reduction gear. A sensor that precisely detects the position of the lens enables high-speed and accurate AF, which is ideal when shooting continually moving subjects or recording video. And with a focusing system that is both smooth and quiet, the 17-70mm f/2.8 lets you shoot free from stress not worrying the drive sound in a quiet environment.