The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina AT-X 14-20mm F2 Pro DX and the Sigma 10-20mm F3.5 EX DC 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. Tokina AT-X 14-20mm F2 Pro DX is the longer of the two lenses at 106mm. The Sigma 10-20mm F3.5 EX DC HSM with a length of 88mm, is 18mm shorter. Besides being longer, the Tokina AT-X 14-20mm F2 Pro DX also has a larger diameter of 89mm compared to the Sigma 10-20mm F3.5 EX DC HSM's 87mm 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. Sigma 10-20mm F3.5 EX DC HSM weighs 520g, 28% (205g) lighter than the Tokina AT-X 14-20mm F2 Pro DX's weight of 725g.
Filter Threads
Both the Tokina AT-X 14-20mm F2 Pro DX and the Sigma 10-20mm F3.5 EX DC HSM have the same Filter thread size of 82mm.
Below are links to the 82mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Tokina AT-X 14-20mm F2 Pro DX and the Sigma 10-20mm F3.5 EX DC HSM has the same Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.
Tokina AT-X 14-20mm F2 Pro DX is also available in Canon EF mount.
Sigma 10-20mm F3.5 EX DC HSM is also available in Canon EF , Pentax KAF3, Sony Alpha and Sigma SA mounts.
Focal Range
Tokina AT-X 14-20mm F2 Pro DX has a focal range of 14-20mm and
1.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
21-30mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 10-20mm F3.5 EX DC HSM has a focal range of 10-20mm and 2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 15-30mm when used on a APS-C / DX format camera.