Ultra wide-angle zoom lenses are tricky to manufacture, with a lot of difficulties to overcome. One of Tamron's newest lenses, however, has been getting strong reviews. So, how does it hold up?
The Tamron 11-20mm f/2.8 Di III-A RXD is an APS-C lens for Sony E mount cameras. It is equivalent to 17-30mm on a 35mm sensor, which puts it as a highly versatile piece of equipment. Typically, lenses this wide rarely have a quick widest aperture, but as you can see, this Tamron boasts f/2.8. To make matters even more impressive, it is compact in form, and lightweight at just 335 g.
This appealing spec sheet puts it on the map for a number of genres. As with most UWA zoom lenses, it fits nicely into the genres of landscape, street, and architectural. However, with such a wide minimum aperture, it also potentially lends itself to astrophotography too. Tamron has also added a lot to the lens to overcome some common problems, which are somewhat lost under the many initialisms. The lens has XLD, LD, GM, and BBAR-G2, which I won't spell out, but I will give an overview of what they provide: there ought to be very little color fringing, chromatic aberrations, and image distortion. There is also said to be better clarity and color accuracy as a result. Finally, the coating applied to the lens elements suppresses internal reflections, flare, ghosting, and other visual artefacts that can either ruin images by appearing, or negatively affect contrast and colors.
What do you make of Tamron's new UWA?