Tamron 28-200mm f/2.8-5.6 Di III RXD lens for Sony

The world’s first F2.8 all-in-one zoom lens for full-frame mirrorless cameras
A remarkable first for an all-in-one zoom lens: the 28-200mm F2.8-5.6 achieves a fast F2.8 aperture at the 28mm wide-angle end. Additionally, maximum apertures at intermediate zoom ranges are F3.5 at 50mm, F4.5 at 100mm, and F5.6 at 150mm through 200mm. As an unprecedented all-in-one zoom that combines fast aperture with compact size, the 28-200mm F2.8-5.6 delivers greater versatility and usefulness than ever before available.

Lightweight and compact size for superior mobility
Tamron’s series of full-frame mirrorless camera lenses, starting with the 28-75mm F2.8 (Model A036), has been developed with the overall goal of balancing high performance with convenience. In addition to the series-standard 67mm filter diameter, and leveraging the camera integrated image stabilization, engineers concentrated on achieving compact size and light weight. Length is just 4.6”, maximum diameter is 74mm, and the weight is a mere 20.3 oz. With a size that offers excellent portability, the lens lightens your load, allowing you to travel comfortably and shoot unencumbered.

Uncompromising image quality that lets you focus on creativity
This new zoom lens contains 18 elements in 14 groups. A generous assortment of special lens elements that includes GM (Glass Molded Aspherical), hybrid aspherical, XLD (eXtra Low Dispersion) and LD (Low Dispersion) lens elements is precisely arranged to effectively control chromatic and other aberrations, enabling high resolving power. Meanwhile, the BBAR (Broad-Band Anti-Reflection) Coating provides powerful anti-reflection properties to effectively reduce ghosting and flare, resulting in clear and crisp images. In-camera correction features are utilized to mitigate distortion and shading to achieve uniformly high image quality from edge-to-edge at all zoom settings. Tamron has concentrated all its all-in-one zoom technologies into achieving optical performance that sets a new standard among existing all-in-one zoom lenses.

The RXD stepping motor unit is exceptionally quiet　
The AF drive incorporates a sensor that accurately detects the position of the lens while the RXD motor unit delivers optimized AF control. This achieves very fast and accurate autofocus operation, allowing users to maintain tack-sharp focus on continuously moving subjects or when filming video. The exceedingly quiet operation is an important advantage because it virtually eliminates extraneous sounds during video recording. In addition, the compact configuration of the RXD AF drive system contributes to the unprecedented size and weight reduction.

Moisture-Resistant Construction, Fluorine Coating, and Zoom Lock switch
Seals are located at the lens mount area and other critical locations to deter infiltration of moisture and/or rain drops and afford Moisture-Resistant Construction. This feature provides an additional layer of protection when shooting outdoors under adverse weather conditions. Also, the front surface of the lens element is coated with a protective fluorine compound that has excellent water- and oil-repellant qualities. The lens surface is easier to wipe clean and is less vulnerable to the damaging effects of dirt, moisture or oily fingerprints, allowing for much easier maintenance. Additionally, the handy Zoom Lock switch prevents unwanted barrel extension during transportation.