The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm GF 45-100mm F4 R LM OIS WR and the Canon 400mm f4.0 DO IS 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. Canon 400mm f4.0 DO IS USM is the longer of the two lenses at 233mm. The Fujifilm GF 45-100mm F4 R LM OIS WR with a length of 145mm, is 88mm shorter. Besides being longer, the Canon 400mm f4.0 DO IS USM also has a larger diameter of 128mm compared to the Fujifilm GF 45-100mm F4 R LM OIS WR's 93mm 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. Fujifilm GF 45-100mm F4 R LM OIS WR weighs 1005g, which means it is 935g (48%) lighter than the Canon 400mm f4.0 DO IS USM which has a weight of 1940g.
Filter Threads
The Fujifilm GF 45-100mm F4 R LM OIS WR has a filter size of 82mm whereas the Canon 400mm f4.0 DO IS 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 82mm filters that we recommend you to consider for the Fujifilm GF 45-100mm F4 R LM OIS WR:
And these are the 52mm filters that we recommend for the Canon 400mm f4.0 DO IS USM:
Lens Mounts
The Fujifilm GF 45-100mm F4 R LM OIS WR has the Fujifilm G lens mount whereas the Canon 400mm f4.0 DO IS USM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm GFX Eterna 55, Fujifilm GFX 100S II and Fujifilm GFX 100 II for the Fujifilm G Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Focal Range
Fujifilm GF 45-100mm F4 R LM OIS WR has a focal range of 45-100mm and
2.2X zoom ratio .
On the other hand, the Canon 400mm f4.0 DO IS 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.
