The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 135mm F1.8 DG HSM and the Canon 300mm f4.0L 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 300mm f4.0L IS USM is the longer of the two lenses at 221mm. The Sigma 135mm F1.8 DG HSM with a length of 115mm, is 106mm shorter. On the other hand, the Sigma 135mm F1.8 DG HSM has a larger diameter of 91mm compared to the Canon 300mm f4.0L IS USM's 90mm 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. Sigma 135mm F1.8 DG HSM weighs 1130g, which means it is 60g (5%) lighter than the Canon 300mm f4.0L IS USM which has a weight of 1190g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Canon EF Mount for size comparison purposes.
Telephoto Lenses in Canon EF Mount for Size Comparison
Filter Threads
The Sigma 135mm F1.8 DG HSM has a filter size of 82mm whereas the Canon 300mm f4.0L IS USM has a 77mm 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 Sigma 135mm F1.8 DG HSM:
And these are the 77mm filters that we recommend for the Canon 300mm f4.0L IS USM:
Lens Mounts
Both the Sigma 135mm F1.8 DG HSM and the Canon 300mm f4.0L 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 135mm F1.8 DG HSM is also available in the Sigma SA , Nikon F (FX) and Sony E mounts.
Focal Range
Sigma 135mm F1.8 DG HSM is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
216mm.
On the other hand, the Canon 300mm f4.0L IS USM is a prime lens with fixed focal lenght of 300mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 480mm.
