The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 10-20mm F3.5 EX DC HSM and the Canon 10-22mm f3.5-4.5 USM 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. Canon 10-22mm f3.5-4.5 USM is the longer of the two lenses at 90mm. The Sigma 10-20mm F3.5 EX DC HSM with a length of 88mm, is 2mm shorter. On the other hand, the Sigma 10-20mm F3.5 EX DC HSM has a larger diameter of 87mm compared to the Canon 10-22mm f3.5-4.5 USM's 84mm 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. Canon 10-22mm f3.5-4.5 USM weighs 385g, 25% (135g) lighter than the Sigma 10-20mm F3.5 EX DC HSM's weight of 520g.
Filter Threads
The Sigma 10-20mm F3.5 EX DC HSM has a filter size of 82mm whereas the Canon 10-22mm f3.5-4.5 USM has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Sigma 10-20mm F3.5 EX DC HSM:
And these are the 77mm filters that we recommend for the Canon 10-22mm f3.5-4.5 USM:
Lens Mounts
The Sigma 10-20mm F3.5 EX DC HSM has the Sigma SA lens mount whereas the Canon 10-22mm f3.5-4.5 USM has the Canon EF-S lens mount. Some of the latest released cameras that are compatible with these mounts are Sigma SD1 Merrill, Sigma SD1 and for the Sigma SA Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount.
Sigma 10-20mm F3.5 EX DC HSM is also available in the Canon EF , Pentax KAF3, Sony Alpha and Nikon F (DX) mounts.
Focal Range
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.
On the other hand, the Canon 10-22mm f3.5-4.5 USM has a focal range of 10-22mm and 2.2X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 16-35.2mm when used on a APS-C / DX format camera.
