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 Canon 400mm F4 DO IS II USM 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 150-600mm F5-6.3 Di VC USD G2 is the longer of the two lenses at 258mm. The Canon 400mm F4 DO IS II USM with a length of 233mm, is 25mm shorter. On the other hand, the Canon 400mm F4 DO IS II USM has a larger diameter of 128mm compared to the Tamron 150-600mm F5-6.3 Di VC USD G2's 106mm diameter.
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 150-600mm F5-6.3 Di VC USD G2 weighs 2010g, which means it is 90g (4%) lighter than the Canon 400mm F4 DO IS II USM which has a weight of 2100g.
Filter Threads
The Tamron 150-600mm F5-6.3 Di VC USD G2 has a filter size of 95mm whereas the Canon 400mm F4 DO IS II USM has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 95mm filters that we recommend you to consider for the Tamron 150-600mm F5-6.3 Di VC USD G2:
And these are the 52mm filters that we recommend for the Canon 400mm F4 DO IS II USM:
Lens Mounts
Both the Tamron 150-600mm F5-6.3 Di VC USD G2 and the Canon 400mm F4 DO 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 150-600mm F5-6.3 Di VC USD G2 is also available in the Sony Alpha 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 1.6x crop, it provides a 35mm (FF) equivalent of
240 - 960mm.
On the other hand, the Canon 400mm F4 DO IS II USM is a prime lens with fixed focal lenght of 400mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 640mm.