Perhaps no workhorse lens is more ubiquitous than the standard zoom with an f/2.8 aperture. Capable of handling a diverse range of applications and needs, these lenses can be found in many photographers and filmmakers bags, though they are often rather expensive. At $799, that makes the Tamron 17-70mm f/2.8 Di III-A VC RXD rather refreshing. Can it keep up with more expensive options? This excellent video review takes a look at the sort of performance and image quality you can expect from the lens.