The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 105mm F1.4 DG HSM A 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 105mm F1.4 DG HSM A with a length of 132mm, is 89mm shorter. On the other hand, the Sigma 105mm F1.4 DG HSM A has a larger diameter of 116mm 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. Canon 300mm f4.0L IS USM weighs 1190g, 27% (455g) lighter than the Sigma 105mm F1.4 DG HSM A's weight of 1645g.
Filter Threads
The Sigma 105mm F1.4 DG HSM A has a filter size of 105mm 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 105mm filters that we recommend you to consider for the Sigma 105mm F1.4 DG HSM A:
And these are the 77mm filters that we recommend for the Canon 300mm f4.0L IS USM:
Lens Mounts
The Sigma 105mm F1.4 DG HSM A has the Leica L lens mount whereas the Canon 300mm f4.0L IS USM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Focal Range
Sigma 105mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 105mm.
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.
