The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF 70-200 F2.8L IS III USM and the Tamron 70-200mm f2.8 VC USD for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Canon EF 70-200 F2.8L IS III USM is the longer of the two lenses at 199mm. The Tamron 70-200mm f2.8 VC USD with a length of 197mm is 2mm shorter. Besides being longer, the Canon EF 70-200 F2.8L IS III USM also has a larger diameter of 89mm compared to Tamron 70-200mm f2.8 VC USD's 86mm 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. Canon EF 70-200 F2.8L IS III USM weighs 1440g, which means it is 30g (2%) lighter than the Tamron 70-200mm f2.8 VC USD which has a weight of 1470g.
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
Both Canon EF 70-200 F2.8L IS III USM and Tamron 70-200mm f2.8 VC USD 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 70-200mm f2.8 VC USD is also available in Nikon F (FX) and Sony Alpha mounts.
Both lenses have the same focal range of 70-200mm and the fastest aperture of F2.8.