The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 24-70mm f2.8 VC USD and the Sigma 24-105mm F4 DG OS HSM 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 24-70mm f2.8 VC USD is the longer of the two lenses at 117mm. The Sigma 24-105mm F4 DG OS HSM with a length of 109mm, is 8mm shorter. On the other hand, the Sigma 24-105mm F4 DG OS HSM has a larger diameter of 89mm compared to the Tamron 24-70mm f2.8 VC USD'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. Tamron 24-70mm f2.8 VC USD weighs 825g, which means it is 60g (6%) lighter than the Sigma 24-105mm F4 DG OS HSM which has a weight of 885g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Sony Alpha Mount for size comparison purposes.
Standard Lenses in Sony Alpha Mount for Size Comparison
Filter Threads
Both the Tamron 24-70mm f2.8 VC USD and the Sigma 24-105mm F4 DG OS HSM have the same Filter thread size of 82mm.
Below are links to the 82mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Tamron 24-70mm f2.8 VC USD and the Sigma 24-105mm F4 DG OS 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.
Tamron 24-70mm f2.8 VC USD is also available in the Canon EF and Nikon F (FX) mounts.
Sigma 24-105mm F4 DG OS HSM is also available in Canon EF , Nikon F (FX) and Sigma SA mounts.
Focal Range
Tamron 24-70mm f2.8 VC USD has a focal range of 24-70mm and
2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36 - 105mm.
On the other hand, the Sigma 24-105mm F4 DG OS HSM has a focal range of 24-105mm and 4.4X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36 - 157.5mm.
