Tamron 17-70mm F2.8 Di III-A VC RXD

Expand your photo experience with an advanced standard zoom lens

The world's first 17-70mm F2.8, large aperture standard zoom lens for APS-C mirrorless cameras

The 17-70mm F/2.8 Di III-A2 VC RXD (Model B070) is a large aperture everyday zoom lens for Sony E-mount APS-C mirrorless cameras. Fast, sharp, quiet, and small—this new APS-C zoom lens is extraordinarily versatile and perfect for everyday photography. The lens was created to achieve a broad zoom range and excellent image quality. With a focal length range of 17-70mm (a full-frame equivalent of 25.5-105mm), it’s the world's first 17-70mm F2.8 standard zoom lens with a 4.1x zoom ratio for APS-C cameras.

1 Among interchangeable F2.8 standard zoom lenses for APS-C mirrorless cameras (As of November 2020: Tamron) 2 Di III-A is the new designation for Tamron's line of lenses exclusively for APS-C mirrorless cameras.

Focal length of 17-70mm for shooting in a broad range of situations This versatile zoom lens lets you enjoy shooting in a multitude of genres, from wide-angle scenes to telephoto moments. With a focal length range of 17mm to 70mm (a full-frame equivalent of 25.5-105mm), this is the world's first large aperture F2.8 standard zoom lens for APS-C mirrorless cameras to achieve a 4.1x zoom ratio. It’s ideal for a variety of scenarios, from portraits and street snapshots, to landscapes and even close-ups.
	Fast F2.8 aperture available throughout the entire zoom range The 17-70mm F2.8 maintains its large F2.8 maximum aperture throughout the entire zoom range (unlike variable aperture lenses that darken as you zoom). Thanks to F2.8 and high optical performance, 17-70mm F2.8 allows you to capture your subjects with clear details from wide angle to telephoto. The three main advantages of a large F2.8 aperture are: A) ability to shoot successfully in lower light levels, B) beautiful and dreamy bokeh, and C) better control of depth-of-field which is particularly useful when intentionally limiting depth-of-field to improve portraits by blurring the area behind the main subject. Structurally, the optical formula includes 16 elements in 12 groups. It was created in pursuit of superior optical performance, utilizing an effective allocation of two GM (Glass Molded Aspherical) lens elements and one aspherical hybrid lens element. The optical design ensures high resolution and high contrast not just in the center of the frame but also in corners and at the edges.
VC for stable photography and video shooting The 17-70mm F2.8 utilizes Tamron's highly regarded, proprietary VC image stabilization system to maximize the inherent optical performance of the lens. It reduces the degradation of picture quality caused by minute camera shake that is likely to occur during handheld shooting at slow shutter speeds under low-light conditions indoors or at dusk. When shooting video, by leveraging AI technology, image stabilization performance improves compared to conventional models.
	Focuses close – MOD of 0.19m (7.5 in) at the wide-angle end This advanced lens focuses extremely close for a standard zoom lens for APS-C mirrorless cameras. The MOD (Minimum Object Distance) is just 0.19m (7.5 in) at the wide-angle end and 0.39m (15.4 in) at the telephoto end. When shooting very close to the subject, the lens enables expressive imagery with highly blurred backgrounds, a feature unique to large-aperture lenses. This allows you to create one-of-a-kind photo of a variety of subjects, from snapshots to portraits, landscapes and even architectural photography. Close-up shots of scenery taken at the 17mm end maximize the unique perspective only true wide-angle lenses can deliver.
Compact, lightweight design is perfect match for APS-C mirrorless cameras This lens was created through the uncompromising pursuit of portability optimized for use with APS-C Sony E-mount cameras. Even with the inclusion of high-performance VC, the 17-70mm F2.8 is extremely light weight and compact, with an overall length of just 119.3mm (4.7 in), maximum diameter of 74.6mm, and weight of 525g (18.5 oz). It is a very versatile lens for travel, where small bags are preferred, and is a great portable lens for daily use.

Specifications

Focal Length: 17-70mm
Maximum Aperature: F2.8
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 (WIDE) / 0.39m (TELE)
Maximum Magnification Ratio: 1:4.8 (WIDE) / 1:5.2 (TELE)
Filter Size: f67mm
Maximum Diameter: f74.6mm
Length*: 119.3mm
Weight: 525g 
Aperature Blades: 9 (circular diaphragm)**
Minimum Aperture: F22
Standard Accessory: Flower-shaped hood, Lens caps
Compatible Mounts: Sony E-mount, FujiFilm X-mount

* Length is the distance from the front tip of the lens to the lens mount face.
** The circular diaphragm stays almost perfectly circular up to two stops down from maximum aperture.