The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina Opera 16-28mm F2.8 FF and the Sigma 14-24mm F2.8 DG HSM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 14-24mm F2.8 DG HSM is the longer of the two lenses at 135mm. The Tokina Opera 16-28mm F2.8 FF with a length of 134mm is 1mm shorter. Besides being longer, the Sigma 14-24mm F2.8 DG HSM also has a larger diameter of 96mm compared to Tokina Opera 16-28mm F2.8 FF's 89mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Tokina Opera 16-28mm F2.8 FF weighs 940g, which means it is 210g (18%) lighter than the Sigma 14-24mm F2.8 DG HSM which has a weight of 1150g.
Below you can find the dimension and weight table of the 'Wideangle Zoom Lenses in Canon EF Mount for size comparison purposes.
Wideangle Zoom Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both Tokina Opera 16-28mm F2.8 FF and Sigma 14-24mm F2.8 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.
Tokina Opera 16-28mm F2.8 FF is also available in Nikon F (FX) mount.
Sigma 14-24mm F2.8 DG HSM is also available in Nikon F (FX) and Sigma SA mounts.
Focal Range
Tokina Opera 16-28mm F2.8 FF has a focal range of 16-28mm and 1.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 25.6 - 44.8mm.
Sigma 14-24mm F2.8 DG HSM has a focal range of 14-24mm and 1.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 22.4 - 38.4mm.