The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 8-15mm f4L Fisheye USM and the Sigma 12-24mm F4.5-5.6 II DG HSM 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 12-24mm F4.5-5.6 II DG HSM is the longer of the two lenses at 120mm. The Canon 8-15mm f4L Fisheye USM with a length of 83mm, is 37mm shorter. Besides being longer, the Sigma 12-24mm F4.5-5.6 II DG HSM also has a larger diameter of 87mm compared to the Canon 8-15mm f4L Fisheye 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 8-15mm f4L Fisheye USM weighs 540g, which means it is 130g (19%) lighter than the Sigma 12-24mm F4.5-5.6 II DG HSM which has a weight of 670g.
Below you can find the dimension and weight table of the Wideangle Fisheye Zoom Lenses in Canon EF Mount for size comparison purposes.
Ultra-Wideangle Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both the Canon 8-15mm f4L Fisheye USM and the Sigma 12-24mm F4.5-5.6 II DG HSM 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 12-24mm F4.5-5.6 II DG HSM is also available in Sigma SA and Nikon F (FX) mounts.
Focal Range
Canon 8-15mm f4L Fisheye USM has a focal range of 8-15mm and
1.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
12.8 - 24mm.
On the other hand, the Sigma 12-24mm F4.5-5.6 II DG HSM has a focal range of 12-24mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 19.2 - 38.4mm.
