The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 150-600mm F5-6.3 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 150-600mm F5-6.3 Di VC USD G2 is the longer of the two lenses at 258mm. The Sigma 70-200mm F2.8 EX DG HSM II with a length of 184mm is 74mm shorter. Besides being longer, the Tamron 150-600mm F5-6.3 Di VC USD G2 also has a larger diameter of 106mm 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, 30% (620g) lighter than the Tamron 150-600mm F5-6.3 Di VC USD G2's weight of 2010g.
Below you can find the dimension and weight table of the 'Telephoto Zoom Lenses in Sony Alpha Mount for size comparison purposes.
Telephoto Zoom Lenses in Sony Alpha Mount for Size Comparison
Lens Mounts
Both Tamron 150-600mm F5-6.3 Di VC USD G2 and Sigma 70-200mm F2.8 EX DG HSM II 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 150-600mm F5-6.3 Di VC USD G2 is also available in Nikon F (FX) and Canon EF mounts.
Sigma 70-200mm F2.8 EX DG HSM II is also available in Canon EF , Four Thirds, Pentax KAF3, Sigma SA and Nikon F (FX) mounts.
Focal Range
Tamron 150-600mm F5-6.3 Di VC USD G2 has a focal range of 150-600mm and 4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 225 - 900mm.
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 1.5x crop, it provides an 35mm (FF) equivalent of 105 - 300mm.