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 24-35mm F2 DG HSM A 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. Tokina Opera 16-28mm F2.8 FF is the longer of the two lenses at 134mm. The Sigma 24-35mm F2 DG HSM A with a length of 123mm, is 11mm shorter. Besides being longer, the Tokina Opera 16-28mm F2.8 FF also has a larger diameter of 89mm compared to the Sigma 24-35mm F2 DG HSM A's 88mm 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 Opera 16-28mm F2.8 FF weighs 940g, which means it is 1g (0%) lighter than the Sigma 24-35mm F2 DG HSM A which has a weight of 941g.
Lens Mounts
Both the Tokina Opera 16-28mm F2.8 FF and the Sigma 24-35mm F2 DG HSM A 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 24-35mm F2 DG HSM A 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 a 35mm (FF) equivalent of
25.6 - 44.8mm.
On the other hand, the Sigma 24-35mm F2 DG HSM A has a focal range of 24-35mm and 1.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 38.4 - 56mm.