Tamron has just announced a new, constant-aperture standard zoom for APS-C-format Sony E-mount cameras: the 17-70mm f/2.8 Di III-A VC RXD. With a 25.5-105mm equivalent focal length range, this fast, versatile lens offers a 4.1x zoom ratio, perfect for near and distant subjects. A constant f/2.8 maximum aperture, and the inclusion of Tamron's Vibration Compensation (VC) image stabilization, make this lens a solid choice for handheld shooting under a variety of lighting conditions.
The optical design includes two Glass Molded Aspherical (GM) elements, one hybrid aspherical element, and two low-dispersion elements to minimize distortion and color fringing to produce sharp images with clear rendering and accurate color. A Broad-Band Anti-Reflection (BBAR) coating also suppresses reflections for greater contrast, especially in backlit conditions. With a minimum focusing distance of 7.5" at the wide end and 15.4" at the tele end, you can make creative wide-angle close-ups as well as tighter portraits with this lens.
Autofocus is handled via an RXD stepping motor, which is capable of fast, quiet focusing and is also compatible with Hybrid AF, Eye AF, and Direct Manual Focus features for intuitive control. Designed for Sony's compact APS-C cameras, the 17-70mm maintains a form factor that meshes well with the a6000-series cameras. Weighing 1.2 lb with a length of 4.7", it is a perfect choice for versatile everyday carry.
Photographers working outdoors will appreciate the lens's moisture-resistant construction, as well as a fluorine coating on the front element to repel water, oil, and other contaminants. It accepts 67mm filters and comes with a lens cap and hood.
What do you think of Tamron's latest zoom? Is it for you? Share your thoughts in the Comments section, below!