The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina atx-i Pro 11-16mm F2.8 CF and the Sigma 14mm F1.8 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 14mm F1.8 DG HSM is the longer of the two lenses at 126mm. The Tokina atx-i Pro 11-16mm F2.8 CF with a length of 89mm, is 37mm shorter. Besides being longer, the Sigma 14mm F1.8 DG HSM also has a larger diameter of 95mm compared to the Tokina atx-i Pro 11-16mm F2.8 CF's 84mm 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. Tokina atx-i Pro 11-16mm F2.8 CF weighs 555g, which means it is 615g (52%) lighter than the Sigma 14mm F1.8 DG HSM which has a weight of 1170g.
Lens Mounts
The Tokina atx-i Pro 11-16mm F2.8 CF has the Canon EF-S lens mount whereas the Sigma 14mm F1.8 DG HSM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Tokina atx-i Pro 11-16mm F2.8 CF is also available in Canon EF-S mount.
Sigma 14mm F1.8 DG HSM is also available in Sigma SA and Nikon F (FX) mounts.
Focal Range
Tokina atx-i Pro 11-16mm F2.8 CF has a focal range of 11-16mm and
1.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
17.6-25.6mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 14mm F1.8 DG HSM is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 22.4mm.