Nikon 16-35mm f/4 vs Nikon 18-35mm f/3.5-4.5
01 Every mm counts With wide lenses, two millimetres can mean the difference between squeezing the whole room into the shot or not. The 18-35mm has a maximum angle of view of 100 degrees, while the 16-35mm gives 107-degree coverage. Neither is a sensible choice for use with a DX SLR, as the effective crop means you lose the wide-angle effect.
02 Heavy glass The 16-35mm lens tips weighs in at 678g, while the budgetpriced 18-35mm is just 381g.
03 Blur beater Unlike many wide-angles, the 16-35mm has built-in Vibration Reduction (VR). This image stabilisation may not seem as useful as on a telephoto lens, where image shake is more of a worry, but it is useful for shooting handheld in low-light situations where you may need to use low shutter speeds.
04 Aperture difference The 16-35mm has a fixed maximum aperture of f/4 through its zoom range. With the 18-35mm, the maximum aperture reduces from f/3.5 to f/4.5 as you zoom in. In practical use, this is not a reason to choose one lens over the other.
05 Flash of the blade The 16-35mm has a nine-blade diaphragm, creating more circular aperture openings than the seven-bladed 18-35mm when the lens is stopped down to f/8 or smaller.