The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 18-200mm F3.5-6.3 DC OS HSM and the Canon 28-200mm f3.5-5.6 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. Sigma 18-200mm F3.5-6.3 DC OS HSM is the longer of the two lenses at 98mm. The Canon 28-200mm f3.5-5.6 USM with a length of 90mm, is 8mm shorter. Besides being longer, the Sigma 18-200mm F3.5-6.3 DC OS HSM also has a larger diameter of 79mm compared to the Canon 28-200mm f3.5-5.6 USM's 78mm 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 28-200mm f3.5-5.6 USM weighs 500g, 16% (100g) lighter than the Sigma 18-200mm F3.5-6.3 DC OS HSM's weight of 600g.
Below you can find the dimension and weight table of the SuperZoom Lenses in Canon EF Mount for size comparison purposes.
Superzoom Lenses in Canon EF Mount for Size Comparison
Filter Threads
Both the Sigma 18-200mm F3.5-6.3 DC OS HSM and the Canon 28-200mm f3.5-5.6 USM have the same Filter thread size of 72mm.
Below are links to the 72mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 18-200mm F3.5-6.3 DC OS HSM and the Canon 28-200mm f3.5-5.6 USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon T8i, Canon 90D and Canon SL3.
Sigma 18-200mm F3.5-6.3 DC OS HSM is also available in the Nikon F (DX) and Sigma SA mounts.
Focal Range
Sigma 18-200mm F3.5-6.3 DC OS HSM has a focal range of 18-200mm and
11.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
28.8-320mm when used on a APS-C / DX format camera.
On the other hand, the Canon 28-200mm f3.5-5.6 USM has a focal range of 28-200mm and 7.1X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 44.8 - 320mm.
