The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF 400mm F2.8L IS III USM and the Canon TS-E 17mm f4L 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. Canon EF 400mm F2.8L IS III USM is the longer of the two lenses at 343mm. The Canon TS-E 17mm f4L with a length of 107mm, is 236mm shorter. Besides being longer, the Canon EF 400mm F2.8L IS III USM also has a larger diameter of 163mm compared to the Canon TS-E 17mm f4L's 89mm 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. Canon TS-E 17mm f4L weighs 820g, 71% (2020g) lighter than the Canon EF 400mm F2.8L IS III USM's weight of 2840g.
Lens Mounts
Both the Canon EF 400mm F2.8L IS III USM and the Canon TS-E 17mm f4L 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.
Focal Range
Canon EF 400mm F2.8L IS III 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.
On the other hand, the Canon TS-E 17mm f4L is a prime lens with fixed focal lenght of 17mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 27.2mm.