Tamron 28-200mm f/2.8-5.6 RXD Di III
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Relatively small and lightweight all-in-one lens for everyday use in conjunction with Sony E-mount full-frame mirrorless cameras. It is both a good wide aperture with a fast aperture of f/2.8 at the short end, and a versatile portrait lens, and offers a 7x zoom for travelers or photo hunters of shy animals. The model is equipped with a quiet RXD autofocus stepping motor with a special sensor that accurately determines the position of the lens.
In addition, the model's optical design of 18 elements in 14 groups includes a GM molded glass aspherical element, hybrid aspherical lenses, an XLD extra-low dispersion element, and LD ED lenses, effectively combating all kinds of distortion and aberrations. The aperture of the zoom lens is 7-bladed — everything is standard here. Of the compromises, it is necessary to single out perhaps the plastic case. However, thanks to him, the lens weighs only 576 g. The diameter of the thread for mounting on the front lens of the filter model is 67 mm.
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Buy Tamron 28-200mm f/2.8-5.6 RXD Di III
All prices 16 →Tamron 28-200mm f/2.8-5.6 Di III RXD Lens for Sony E 28-200 Tam 2.8-5.6 S | $699.00 |  | |||
| $699.99 |  | ||||
Tamron Tamron 28-200mm F/2.8-5.6 Di III RXD Lens For Sony AFA071S-700 | $699.00 |  | |||
Tamron 28-200mm f/2.8-5.6 Di III RXD Lens for Sony E AFA071S-700 | $699.00 |  | |||
| $739.00 | | ||||
In Sony's full-frame fleet of optics for mirrorless cameras, there is a stabilized "station wagon" Sony FE 24-240mm f / 3.5-6.3 OSS. A worthy third-party alternative is the Tamron 28-200mm f/2.8-5.6 Di III RXD. And that's why.
High aperture
Despite a slightly smaller focal length spread, Tamron's brainchild offers a higher aperture throughout the entire zoom range. For example, at wide-angle, the aperture can be opened to f/2.8, which blurs the background more. At maximum zoom, the lens is also "lighter" than Sony's counterpart — f / 5.6. But what it lacks is an optical stabilizer. However, the lion's share of Sony's full-frame mirrorless cameras is equipped with an on-board stub.
Special elements in the optical scheme
The model draws a sharp picture already from the open aperture. Sharpness steadily grows across the entire field of the frame up to f / 5.6-6.3. The optical design of the model incorporates two glass molded GM aspherical elements, two hybrid aspherical lenses, a duo of LD elements and one XLD element with extra-low dispersion. As a result, the pictures are completely free of chromatic aberrations. In addition, the surfaces of the inner lenses are covered with a multi-layer anti-reflective coating BBAR.
AF stepper motor
The lens relies on a built-in Rapid eXtra-silent stepping Drive (RXD) for focus, which is crisp and quiet. Switching to manual focus is done from the menu interface of the camera, since there is no separate button for changing focus modes on the lens body. And what is provided? Thread for a filter with a diameter of 67 mm near the front lens.
Compactness — above all!
Finally, it is necessary to mention the compact dimensions and low weight of the model relative to its peers : when folded, the dimensions of the lens correspond to the dimensions of a 0.33 L can, with the extended “trunk” — a 0.5 L can, and its weight is slightly more than half a kilogram. The model will fit both novice photographers, and advanced photo enthusiasts, and avid travelers as a universal all-in-one solution.
