The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 24-70mm F2.8 ZA SSM II and the Sigma 24-70mm F2.8 EX DG HSM for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sony 24-70mm F2.8 ZA SSM II is the longer of the two lenses at 111mm. The Sigma 24-70mm F2.8 EX DG HSM with a length of 95mm, is 16mm shorter. On the other hand, the Sigma 24-70mm F2.8 EX DG HSM has a larger diameter of 89mm compared to the Sony 24-70mm F2.8 ZA SSM II's 83mm diameter.
The 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 24-70mm F2.8 EX DG HSM weighs 790g, 18% (184g) lighter than the Sony 24-70mm F2.8 ZA SSM II's weight of 974g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Sony Alpha Mount for size comparison purposes.
Standard Zoom Lenses in Sony Alpha Mount for Size Comparison
Lens Mounts
Both the Sony 24-70mm F2.8 ZA SSM II and the Sigma 24-70mm F2.8 EX DG 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 24-70mm F2.8 EX DG HSM is also available in Canon EF , Pentax KAF3, Sigma SA and Nikon F (FX) mounts.
Focal Range
Both lenses have the same focal range of 24-70mm and the fastest aperture of F2.8.