The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 12-24mm F4 DG HSM 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 12-24mm F4 DG HSM is the longer of the two lenses at 132mm. The Sigma 10-20mm F3.5 EX DC HSM with a length of 88mm is 44mm shorter. Besides being longer, the Sigma 12-24mm F4 DG HSM also has a larger diameter of 101mm compared to Sigma 10-20mm F3.5 EX DC HSM's 87mm 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. Sigma 10-20mm F3.5 EX DC HSM weighs 520g, 54% (631g) lighter than the Sigma 12-24mm F4 DG HSM's weight of 1151g.
Below you can find the dimension and weight table of the 'Wideangle Zoom Lenses in Sigma SA Mount for size comparison purposes.
Wideangle Zoom Lenses in Sigma SA Mount for Size Comparison
Both Sigma 12-24mm F4 DG HSM and Sigma 10-20mm F3.5 EX DC HSM has the same Sigma SA lens mount. Some of the latest released cameras that are compatible with the Sigma SA lenses are Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill.
Sigma 12-24mm F4 DG HSM is also available in Nikon F (FX) and Canon EF mounts.
Sigma 10-20mm F3.5 EX DC HSM is also available in Canon EF , Pentax KAF3, Sony Alpha and Nikon F (DX) mounts.
Sigma 12-24mm F4 DG HSM has a focal range of 12-24mm and 2.0X zoom ratio . 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.