The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 70-210mm F4 Di VC USD and the Sigma 70-200mm F2.8 EX DG HSM II 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. Sigma 70-200mm F2.8 EX DG HSM II is the longer of the two lenses at 184mm. The Tamron 70-210mm F4 Di VC USD with a length of 175mm, is 9mm shorter. Besides being longer, the Sigma 70-200mm F2.8 EX DG HSM II also has a larger diameter of 87mm compared to the Tamron 70-210mm F4 Di VC USD's 76mm 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. Tamron 70-210mm F4 Di VC USD weighs 859g, which means it is 531g (38%) lighter than the Sigma 70-200mm F2.8 EX DG HSM II which has a weight of 1390g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Canon EF Mount for size comparison purposes.
Telephoto Zoom Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both the Tamron 70-210mm F4 Di VC USD and the Sigma 70-200mm F2.8 EX DG HSM II has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Tamron 70-210mm F4 Di VC USD is also available in Nikon F (FX) mount.
Sigma 70-200mm F2.8 EX DG HSM II is also available in Four Thirds , Pentax KAF3, Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Focal Range
Tamron 70-210mm F4 Di VC USD has a focal range of 70-210mm and 3.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 112 - 336mm.
Sigma 70-200mm F2.8 EX DG HSM II has a focal range of 70-200mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 112 - 320mm.