The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100-400mm and the Sigma 100-400mm F5-6.3 DG OS 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. Sigma 100-400mm F5-6.3 DG OS HSM is the longer of the two lenses at 182mm. The Canon RF 100-400mm with a length of 165mm, is 17mm shorter. Besides being longer, the Sigma 100-400mm F5-6.3 DG OS HSM also has a larger diameter of 86mm compared to the Canon RF 100-400mm's 80mm 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 RF 100-400mm weighs 635g, which means it is 525g (45%) lighter than the Sigma 100-400mm F5-6.3 DG OS HSM which has a weight of 1160g.
Filter Threads
Both the Canon RF 100-400mm and the Sigma 100-400mm F5-6.3 DG OS HSM have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF 100-400mm has the Canon RF lens mount whereas the Sigma 100-400mm F5-6.3 DG OS HSM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Sigma 100-400mm F5-6.3 DG OS HSM is also available in Sigma SA and Nikon F (FX) mounts.
Focal Range
Both lenses have the same focal range of
100-400mm but while Canon RF 100-400mm has the fastest aperture of
F5.6-8, the Sigma 100-400mm F5-6.3 DG OS HSM's widest aperture value is
F5-6.3.
