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 F4-5.6 EX DC HSM for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor 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 F4-5.6 EX DC HSM with a length of 81mm, is 25mm 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 F4-5.6 EX DC HSM's 84mm diameter.
The 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. Sigma 10-20mm F4-5.6 EX DC HSM weighs 470g, 35% (255g) lighter than the Tokina AT-X 14-20mm F2 Pro DX's weight of 725g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Nikon F (DX) Mount for size comparison purposes.
Wideangle Zoom Lenses in Nikon F (DX) Mount for Size Comparison
Lens Mounts
Both the Tokina AT-X 14-20mm F2 Pro DX and the Sigma 10-20mm F4-5.6 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 F4-5.6 EX DC HSM is also available in Canon EF , Four Thirds, Pentax KAF, 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. Sigma 10-20mm F4-5.6 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.