The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 16-35mm F2.8 ZA SSM II and the Sigma 18-35mm F1.8 DC HSM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 18-35mm F1.8 DC HSM is the longer of the two lenses at 121mm. The Sony 16-35mm F2.8 ZA SSM II with a length of 114mm is 7mm shorter. On the other hand, the Sony 16-35mm F2.8 ZA SSM II has a larger diameter of 83mm compared to Sigma 18-35mm F1.8 DC HSM's 78mm diameter.
Below you can find the scaled side by side image of Sony 16-35mm F2.8 ZA SSM II and Sigma 18-35mm F1.8 DC HSM to get a better idea of how their size compare in real life.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sigma 18-35mm F1.8 DC HSM weighs 810g, 7% (62g) lighter than the Sony 16-35mm F2.8 ZA SSM II's weight of 872g.
Both Sony 16-35mm F2.8 ZA SSM II and Sigma 18-35mm F1.8 DC HSM has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Sigma 18-35mm F1.8 DC HSM is also available in Canon EF , Pentax KAF, Sigma SA and Nikon F (DX) mounts.
Sony 16-35mm F2.8 ZA SSM II has a focal range of 16-35mm and 2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 24 - 52.5mm.
Sigma 18-35mm F1.8 DC HSM has a focal range of 18-35mm and 1.9X zoom ratio which has a 35mm equivalent focal range of 27-52.5mm when used on a APS-C / DX format camera.