Tamron has established itself as a maker of both pragmatic lenses at practical prices and more unique designs that the photo world has not seen before. The new 20-40mm f/2.8 Di III VXD is one of those more unique designs, offering an interesting focal length range that sits between two more traditional zoom ranges (16-35mm and 24-70mm). This great video review takes a look at the lens and the sort of performance and image quality you can expect from it in practice.