Ahead of our full review, here are some sample JPEG and Raw images taken with the new Tamron 28-75mm F2.8 Di III RXD lens, mounted on the Sony A7 III mirrorless camera. The hotly-anticipated 28-75mm F2.8 Di III RXD is the first ever Tamron lens for the Sony Alpha full-frame mirrorless camera system. It retails for a very affordable £699 / $799, which compares favourably with the Sony alternatives.