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 II DC OS HSM and the Tamron 18-200mm F3.5-6.3 Di II VC 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. Tamron 18-200mm F3.5-6.3 Di II VC is the longer of the two lenses at 97mm. The Sigma 18-200mm f3.5-6.3 II DC OS HSM with a length of 88mm, is 9mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 75mm.
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. Tamron 18-200mm F3.5-6.3 Di II VC weighs 400g, 18% (90g) lighter than the Sigma 18-200mm f3.5-6.3 II DC OS HSM's weight of 490g.
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 II DC OS HSM and the Tamron 18-200mm F3.5-6.3 Di II VC have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 18-200mm f3.5-6.3 II DC OS HSM and the Tamron 18-200mm F3.5-6.3 Di II VC 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 II DC OS HSM is also available in Nikon F (DX) and Sigma SA mounts.
Tamron 18-200mm F3.5-6.3 Di II VC is also available in Nikon F (DX) and Sony Alpha mounts.
Focal Range
Both lenses have the same focal range of
18-200mm but while Sigma 18-200mm f3.5-6.3 II DC OS HSM has the fastest aperture of
F3.5 - F6.3, the Tamron 18-200mm F3.5-6.3 Di II VC's widest aperture value is
F3.5 - F5.6.