The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 100-400mm F5-6.3 DG OS HSM and the Canon 75-300mm f4.0-5.6 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. Sigma 100-400mm F5-6.3 DG OS HSM is the longer of the two lenses at 182mm. The Canon 75-300mm f4.0-5.6 IS USM with a length of 138mm, is 44mm 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 75-300mm f4.0-5.6 IS USM's 79mm 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 75-300mm f4.0-5.6 IS USM weighs 650g, 43% (510g) lighter than the Sigma 100-400mm F5-6.3 DG OS HSM's weight of 1160g.
Filter Threads
The Sigma 100-400mm F5-6.3 DG OS HSM has a filter size of 67mm whereas the Canon 75-300mm f4.0-5.6 IS USM has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Sigma 100-400mm F5-6.3 DG OS HSM:
And these are the 58mm filters that we recommend for the Canon 75-300mm f4.0-5.6 IS USM:
Lens Mounts
Both the Sigma 100-400mm F5-6.3 DG OS HSM and the Canon 75-300mm f4.0-5.6 IS USM 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 100-400mm F5-6.3 DG OS HSM is also available in the Sigma SA and Nikon F (FX) mounts.
Focal Range
Sigma 100-400mm F5-6.3 DG OS HSM has a focal range of 100-400mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
160 - 640mm.
On the other hand, the Canon 75-300mm f4.0-5.6 IS USM has a focal range of 75-300mm and 4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 120 - 480mm.
