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 C and the Canon 28-200mm f3.5-5.6 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 28-200mm f3.5-5.6 is the longer of the two lenses at 90mm. The Sigma 18-200mm F3.5-6.3 DC OS HSM C with a length of 86mm, is 4mm shorter. Besides being longer, the Canon 28-200mm f3.5-5.6 also has a larger diameter of 78mm compared to the Sigma 18-200mm F3.5-6.3 DC OS HSM C's 71mm 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. Sigma 18-200mm F3.5-6.3 DC OS HSM C weighs 430g, which means it is 65g (13%) lighter than the Canon 28-200mm f3.5-5.6 which has a weight of 495g.
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
The Sigma 18-200mm F3.5-6.3 DC OS HSM C has a filter size of 62mm whereas the Canon 28-200mm f3.5-5.6 has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 18-200mm F3.5-6.3 DC OS HSM C:
And these are the 72mm filters that we recommend for the Canon 28-200mm f3.5-5.6:
Lens Mounts
Both the Sigma 18-200mm F3.5-6.3 DC OS HSM C and the Canon 28-200mm f3.5-5.6 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 C is also available in the Nikon F (DX) , Pentax KAF3, Sony Alpha and Sigma SA mounts.
Focal Range
Sigma 18-200mm F3.5-6.3 DC OS HSM C 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 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.
