The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100-500mm F4.5-7.1L and the Sigma 150-500mm F5-6.3 DG OS HSM for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sigma 150-500mm F5-6.3 DG OS HSM is the longer of the two lenses at 252mm. The Canon RF 100-500mm F4.5-7.1L with a length of 208mm, is 44mm shorter. Besides being longer, the Sigma 150-500mm F5-6.3 DG OS HSM also has a larger diameter of 95mm compared to the Canon RF 100-500mm F4.5-7.1L's 94mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Canon RF 100-500mm F4.5-7.1L weighs 1365g, which means it is 415g (23%) lighter than the Sigma 150-500mm F5-6.3 DG OS HSM which has a weight of 1780g.
Lens Mounts
The Canon RF 100-500mm F4.5-7.1L has the Canon RF lens mount whereas the Sigma 150-500mm F5-6.3 DG OS HSM has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R8, Canon R50 and Canon R6 II for the Canon RF Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Sigma 150-500mm F5-6.3 DG OS HSM is also available in Canon EF , Nikon F (FX), Pentax KAF3 and Sigma SA mounts.
Focal Range
Canon RF 100-500mm F4.5-7.1L has a focal range of 100-500mm and 5.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 160 - 800mm.
Sigma 150-500mm F5-6.3 DG OS HSM has a focal range of 150-500mm and 3.3X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 225 - 750mm.