The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24-35mm F2 DG HSM A and the Tamron 15-30mm f2.8 VC USD for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Tamron 15-30mm f2.8 VC USD is the longer of the two lenses at 145mm. The Sigma 24-35mm F2 DG HSM A with a length of 123mm, is 22mm shorter. Besides being longer, the Tamron 15-30mm f2.8 VC USD also has a larger diameter of 98mm compared to the Sigma 24-35mm F2 DG HSM A's 88mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sigma 24-35mm F2 DG HSM A weighs 941g, which means it is 159g (14%) lighter than the Tamron 15-30mm f2.8 VC USD which has a weight of 1100g.
Lens Mounts
The Sigma 24-35mm F2 DG HSM A has the Nikon F (FX) lens mount whereas the Tamron 15-30mm f2.8 VC USD has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Sigma 24-35mm F2 DG HSM A is also available in Canon EF and Sigma SA mounts.
Tamron 15-30mm f2.8 VC USD is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Sigma 24-35mm F2 DG HSM A has a focal range of 24-35mm and
1.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36 - 52.5mm.
On the other hand, the Tamron 15-30mm f2.8 VC USD has a focal range of 15-30mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 22.5 - 45mm.