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 Canon 24-70mm f2.8L USM 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. Canon 24-70mm f2.8L USM is the longer of the two lenses at 124mm. The Tamron 24-70mm f2.8 VC USD with a length of 117mm, is 7mm shorter. On the other hand, the Tamron 24-70mm f2.8 VC USD has a larger diameter of 88mm compared to the Canon 24-70mm f2.8L USM's 83mm 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 24-70mm f2.8 VC USD weighs 825g, which means it is 125g (13%) lighter than the Canon 24-70mm f2.8L USM which has a weight of 950g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Canon EF Mount for size comparison purposes.
Standard Zoom Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both the Tamron 24-70mm f2.8 VC USD and the Canon 24-70mm f2.8L USM 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 24-70mm f2.8 VC USD is also available in Nikon F (FX) and Sony Alpha mounts.
Focal Range
Both lenses have the same focal range of 24-70mm and the fastest aperture of F2.8.