Tamron AF 70-180mm f/2.8 Di III VXD

When stopped down by one stop, the Tamron 2.8/70-180 mm Di III VXD delivers very high resolution.

... On the APS-C sensor we measure very similar tendencies. At 70 mm and aperture 2.8 the contrast is too low, but the edge drop is extremely low. Stopped down, the lens delivers a very good result over the entire image field - with slightly more edge fall-off. At 112 mm all values are slightly worse, this is especially true for the contrast at f/2.8, but stopped down this focal length is also very usable...

As a particularly affordable and pleasingly powerful alternative to direct competition from Sony, the new Tamron lens is worth a closer look when deciding which lens to buy. If you want to save money in your wallet as well as space in your camera bag, you've come to the right place.