There’s a reason why f/2.8 constant-aperture zooms are generally favoured by enthusiast and professional photographers. With an aperture that’s often two f/stops faster than variable-aperture standard zooms at the long end of the range, you can get a much tighter depth of field for isolating subjects within a scene, along with faster shutter speeds under low lighting conditions for freezing motion.
This lens gives you a more modest zoom range than the similarly priced NIKKOR Z 24-120mm f/4 S, losing a sizeable chunk of wide-angle coverage and a greater loss of telephoto reach at the long end. For many photographers, however, the f/2.8 aperture wins out. It’s also slimmer and lighter than the 24-120mm lens, weighing in at just 565g. As with the Tamron lens on test, it’s particularly lightweight for an f/2.8 standard zoom for full-frame cameras.