The Tamron 17-70mm F2.8 Di III-A RXD Sony E (APS-C) is a large aperture everyday zoom lens for Sony E-mount APS-C cameras offering a broad zoom range, excellent image quality and versatile F2.8 maximum aperture across the whole zoom range. This lens focuses very close, featuring a minimum object distance of 0.19m at the wide-angle and 0.39m at the telephoto end for expressive images with highly blurred backgrounds. The small and lightweight design also includes Tamron's proprietary VC (Vibration Compensation) which utilises AI technology when shooting video for stable footage.
Tamron 17-70mm F2.8 Di III-A RXD Sony E (APS-C) features Moisture-Resistant Construction, Fluorine Coating and a φ67mm filter size – the same as the Tamron series of lenses for full-frame mirrorless cameras. Compatible with many of the features that Sony builds into its cameras, including Fast Hybrid AF and Eye AF, the lens is the ideal everyday zoom lens for a multitude of situations. It is a highly practical lens that enables photographers to attain high image quality while enjoying the benefits of the large F2.8 aperture.
With a focal length range of 17-70mm, equivalent to 25.5-105mm on full-frame cameras. The Tamron 17-70mm F2.8 Di III-A RXD Sony E (APS-C) is the first F2.8 high-speed zoom lens in the world for APS-C mirrorless cameras to achieve a 4.1x zoom ratio.
The optical construction of the new 17-70mm F2.8 is equally impressive and 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.
The Tamron 17-70mm F2.8 Di III-A RXD Sony E (APS-C) utilizes highly regarded VC image stabilisation to maximize the optical performance of the lens when shooting handheld by effectively compensating camera shake. When shooting video, image stabilisation is further improved by leveraging AI technology compared to more conventional modes of stabilisation.
The AF drive incorporates an RXD (Rapid eXtra-silent stepping Drive) stepping motor unit. The RXD actuator is able to precisely control the rotational angle of the motor, allowing it to drive the focusing lens directly without the use of a reduction gear. Additionally, a dedicated sensor senses the position of the lens to a high degree of accuracy - enabling both high-speed and precise AF which allows to maintain razor-sharp focus when shooting moving subjects or filming video.
The new Tamron 17-70mm F2.8 Di III-A RXD Sony E (APS-C) is compatible with many of the advanced features that are specific to Sony Mirrorless cameras. This includes:
The 17-70mm F2.8 zoom measures a scant 119.3mm (4.7 in) in length and 74.6mm in maximum diameter and weighs only 525g (18.5 oz). 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.
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|Focal Length||17-70mm (for APS-C frame mirrorless format)
(for full-frame mirrorless format: 25.5-105mm equivalent field-of-view)
|Angle of View (diagonal)||79° 55'-23° 00' (for APS-C frame mirrorless format)|
|Optical Construction||16 elements in 12 groups|
|Minimum Object Distance||0.19m /7.5 in (WIDE), 0.39m /15.4 in (TELE)|
|Maximum Magnification Ratio||1:4.8 (WIDE) / 1:5.2 (TELE)|
|Length||119.3mm (4.7 in)|
|Weight||525g (18.5 oz)|
|Aperture Blades||9 (circular diaphragm)*
*The circular diaphragm stays almost perfectly circular up to two stops down from maximum aperture.
|Standard Accessories||Flower-shaped hood, Lens caps|
|Compatible Mounts||Sony E-mount|