The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron SP 70-200mm 2.8 Di VC USD G2 and the Sigma 70-200mm F2.8 EX DG HSM II 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 SP 70-200mm 2.8 Di VC USD G2 is the longer of the two lenses at 194mm. The Sigma 70-200mm F2.8 EX DG HSM II with a length of 184mm is 10mm shorter. Besides being longer, the Tamron SP 70-200mm 2.8 Di VC USD G2 also has a larger diameter of 88mm compared to Sigma 70-200mm F2.8 EX DG HSM II's 87mm 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. Sigma 70-200mm F2.8 EX DG HSM II weighs 1390g, 7% (110g) lighter than the Tamron SP 70-200mm 2.8 Di VC USD G2's weight of 1500g.
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 Tamron SP 70-200mm 2.8 Di VC USD G2 and 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 SP 70-200mm 2.8 Di VC USD G2 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
Both lenses have the same focal range of 70-200mm and the fastest aperture of F2.8.