The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 8mm F3.5 EX DG Fisheye and the Canon 24mm f1.4L II 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 24mm f1.4L II USM is the longer of the two lenses at 87mm. The Sigma 8mm F3.5 EX DG Fisheye with a length of 69mm, is 18mm shorter. Besides being longer, the Canon 24mm f1.4L II USM also has a larger diameter of 94mm compared to the Sigma 8mm F3.5 EX DG Fisheye's 74mm 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 8mm F3.5 EX DG Fisheye weighs 400g, which means it is 250g (38%) lighter than the Canon 24mm f1.4L II USM which has a weight of 650g.
Lens Mounts
The Sigma 8mm F3.5 EX DG Fisheye has the Sigma SA lens mount whereas the Canon 24mm f1.4L II USM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill for the Sigma SA 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 8mm F3.5 EX DG Fisheye is also available in the Canon EF and Nikon F (FX) mounts.
Focal Range
Sigma 8mm F3.5 EX DG Fisheye is a prime lens with fixed focal lenght of 8mm.
On the other hand, the Canon 24mm f1.4L II USM is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 38.4mm.
