The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 18-200mm F3.5-6.3 Di II VC and the Sigma 18-200mm F3.5-6.3 DC OS 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 18-200mm F3.5-6.3 DC OS HSM is the longer of the two lenses at 98mm. The Tamron 18-200mm F3.5-6.3 Di II VC with a length of 97mm is 1mm shorter. Besides being longer, the Sigma 18-200mm F3.5-6.3 DC OS HSM also has a larger diameter of 79mm compared to Tamron 18-200mm F3.5-6.3 Di II VC's 75mm 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. Tamron 18-200mm F3.5-6.3 Di II VC weighs 400g, which means it is 200g (33%) lighter than the Sigma 18-200mm F3.5-6.3 DC OS HSM which has a weight of 600g.
Below you can find the dimension and weight table of the 'SuperZoom Lenses in Nikon F (DX) Mount for size comparison purposes.
SuperZoom Lenses in Nikon F (DX) Mount for Size Comparison
Lens Mounts
Both Tamron 18-200mm F3.5-6.3 Di II VC and Sigma 18-200mm F3.5-6.3 DC OS HSM has the same Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.
Tamron 18-200mm F3.5-6.3 Di II VC is also available in Canon EF and Sony Alpha mounts.
Sigma 18-200mm F3.5-6.3 DC OS HSM is also available in Canon EF and Sigma SA mounts.
Focal Range