The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF 70-200 F2.8L IS III USM and the Sigma 105mm F1.4 DG HSM 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 70-200 F2.8L IS III USM is the longer of the two lenses at 199mm. The Sigma 105mm F1.4 DG HSM with a length of 132mm, is 67mm shorter. On the other hand, the Sigma 105mm F1.4 DG HSM has a larger diameter of 116mm compared to the Canon EF 70-200 F2.8L IS III USM'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 EF 70-200 F2.8L IS III USM weighs 1440g, which means it is 205g (12%) lighter than the Sigma 105mm F1.4 DG HSM which has a weight of 1645g.
Filter Threads
The Canon EF 70-200 F2.8L IS III USM has a filter size of 77mm whereas the Sigma 105mm F1.4 DG HSM has a 105mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Canon EF 70-200 F2.8L IS III USM:
And these are the 105mm filters that we recommend for the Sigma 105mm F1.4 DG HSM:
Lens Mounts
Both the Canon EF 70-200 F2.8L IS III USM and the Sigma 105mm F1.4 DG HSM 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.
Sigma 105mm F1.4 DG HSM is also available in Nikon F (FX) , Sigma SA and Sony E mounts.
Focal Range
Canon EF 70-200 F2.8L IS III 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.
On the other hand, the Sigma 105mm F1.4 DG HSM is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 168mm.