The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 100-400mm F4.5-6.3 Di VC USD and the Canon EF 70-200 f2.8L IS II USM for their suitability to various photography scenarios:
Size and Weight Comparison
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, which means it is 355g (23%) lighter than the Canon EF 70-200 f2.8L IS II USM which has a weight of 1490g.
Filter Threads
The Tamron 100-400mm F4.5-6.3 Di VC USD has a filter size of 67mm whereas the Canon EF 70-200 f2.8L IS II USM has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 100-400mm F4.5-6.3 Di VC USD:
And these are the 77mm filters that we recommend for the Canon EF 70-200 f2.8L IS II USM:
Lens Mounts
Both the Tamron 100-400mm F4.5-6.3 Di VC USD and the Canon EF 70-200 f2.8L IS II USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Tamron 100-400mm F4.5-6.3 Di VC USD is also available in the Nikon F (FX) mount.
Focal Range
Tamron 100-400mm F4.5-6.3 Di VC USD has a focal range of 100-400mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
160 - 640mm.
On the other hand, the Canon EF 70-200 f2.8L IS II USM has a focal range of 70-200mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 112 - 320mm.