Mark Goldstein has just posted a full review of the new released Tamron SP 24-70mm f/2.8 Di VC USD G2 lens at the PhotographyBlog.com. They found this new standard zoom is slightly more effective than the Sigma 24-70mm f/2.8 DG OS HSM Art lens, which… Read moreTamron SP 24-70mm f/2.8 Di VC USD G2 Lens Review (PhotographyBlog)