The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 100-400mm F5-6.3 DG OS HSM and the Tamron 100-400mm F4.5-6.3 Di VC USD for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Tamron 100-400mm F4.5-6.3 Di VC USD is the longer of the two lenses at 199mm. The Sigma 100-400mm F5-6.3 DG OS HSM with a length of 182mm, is 17mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 86mm.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Tamron 100-400mm F4.5-6.3 Di VC USD weighs 1135g, 2% (25g) lighter than the Sigma 100-400mm F5-6.3 DG OS HSM's weight of 1160g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Canon EF Mount for size comparison purposes.
Super Telephoto Lenses in Canon EF Mount for Size Comparison
Filter Threads
Both the Sigma 100-400mm F5-6.3 DG OS HSM and the Tamron 100-400mm F4.5-6.3 Di VC USD have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 100-400mm F5-6.3 DG OS HSM and the Tamron 100-400mm F4.5-6.3 Di 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.
Sigma 100-400mm F5-6.3 DG OS HSM is also available in Sigma SA and Nikon F (FX) mounts.
Tamron 100-400mm F4.5-6.3 Di VC USD is also available in Nikon F (FX) mount.
Focal Range
Both lenses have the same focal range of
100-400mm but while Sigma 100-400mm F5-6.3 DG OS HSM has the fastest aperture of
F5-6.3, the Tamron 100-400mm F4.5-6.3 Di VC USD's widest aperture value is
F4.5-6.3.