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 Tamron 24-70mm f2.8 VC USD for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Tamron 24-70mm f2.8 VC USD is the longer of the two lenses at 117mm. The Sony 24-70mm F2.8 ZA SSM II with a length of 111mm is 6mm shorter. Besides being longer, the Tamron 24-70mm f2.8 VC USD also has a larger diameter of 88mm compared to Sony 24-70mm F2.8 ZA SSM II's 83mm diameter.
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. Tamron 24-70mm f2.8 VC USD weighs 825g, 15% (149g) 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 Sony 24-70mm F2.8 ZA SSM II and Tamron 24-70mm f2.8 VC USD 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.
Tamron 24-70mm f2.8 VC USD is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Both lenses have the same focal range of 24-70mm and the fastest aperture of F2.8.