The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 10-24mm f3.5-4.5 II LD and the Sigma 10-20mm F3.5 EX DC 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 10-20mm F3.5 EX DC HSM is the longer of the two lenses at 88mm. The Tamron 10-24mm f3.5-4.5 II LD with a length of 84mm is 4mm shorter. Besides being longer, the Sigma 10-20mm F3.5 EX DC HSM also has a larger diameter of 87mm compared to Tamron 10-24mm f3.5-4.5 II LD's 83mm 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. Tamron 10-24mm f3.5-4.5 II LD weighs 406g, which means it is 114g (21%) lighter than the Sigma 10-20mm F3.5 EX DC HSM which has a weight of 520g.
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 Tamron 10-24mm f3.5-4.5 II LD and 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.
Tamron 10-24mm f3.5-4.5 II LD is also available in Canon EF , Sony Alpha, Pentax KAF and Canon EF mounts.
Sigma 10-20mm F3.5 EX DC HSM is also available in Canon EF , Pentax KAF3, Sony Alpha and Sigma SA mounts.
Focal Range
Tamron 10-24mm f3.5-4.5 II LD has a focal range of 10-24mm and 2.4X zoom ratio which has a 35mm equivalent focal range of 15-36mm when used on a APS-C / DX format camera. Sigma 10-20mm F3.5 EX DC HSM has a focal range of 10-20mm and 2.0X zoom ratio which has a 35mm equivalent focal range of 15-30mm when used on a APS-C / DX format camera.