The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF 11-24mm F4L USM and the Sigma 12-24mm F4 DG HSM for their suitability to various photography scenarios:
Size and Weight Comparison
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Below you can find a scaled side-by-side image of Canon EF 11-24mm F4L USM and Sigma 12-24mm F4 DG HSM to get a better idea of how their sizes compare in real life.
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 12-24mm F4 DG HSM weighs 1151g, 1% (14g) lighter than the Canon EF 11-24mm F4L USM's weight of 1165g.
Below you can find the dimension and weight table of the Wideangle 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 EF 11-24mm F4L USM and the Sigma 12-24mm F4 DG HSM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Sigma 12-24mm F4 DG HSM is also available in Sigma SA and Nikon F (FX) mounts.
Focal Range
Canon EF 11-24mm F4L USM has a focal range of 11-24mm and
2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
17.6 - 38.4mm.
On the other hand, the Sigma 12-24mm F4 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.