The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 20-200mm F3.5-6.3 and the Tamron 28-200mm F2.8-5.6 Di III 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 20-200mm F3.5-6.3 is the longer of the two lenses at 118mm. The Tamron 28-200mm F2.8-5.6 Di III with a length of 117mm, is 1mm shorter. Besides being longer, the Sigma 20-200mm F3.5-6.3 also has a larger diameter of 77mm compared to the Tamron 28-200mm F2.8-5.6 Di III's 74mm diameter.
Below you can find a scaled side-by-side image of Sigma 20-200mm F3.5-6.3 and Tamron 28-200mm F2.8-5.6 Di III to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 20-200mm F3.5-6.3 and the Tamron 28-200mm F2.8-5.6 Di III Size and Weight 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 20-200mm F3.5-6.3 weighs 540g, which means it is 36g (6%) lighter than the Tamron 28-200mm F2.8-5.6 Di III which has a weight of 576g.
Below you can find the dimension and weight table of the SuperZoom Lenses in Sony E Mount for size comparison purposes.
Superzoom Sony E Mount
Filter Threads
The Sigma 20-200mm F3.5-6.3 has a filter size of 72mm whereas the Tamron 28-200mm F2.8-5.6 Di III has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Sigma 20-200mm F3.5-6.3:
And these are the 67mm filters that we recommend for the Tamron 28-200mm F2.8-5.6 Di III:
Lens Mounts
Both the Sigma 20-200mm F3.5-6.3 and the Tamron 28-200mm F2.8-5.6 Di III has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5 , Sony A7R VI and Sony A7 V .
Focal Range
Sigma 20-200mm F3.5-6.3 has a focal range of 20-200mm and
10.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
30 - 300mm .
On the other hand, the Tamron 28-200mm F2.8-5.6 Di III has a focal range of 28-200mm and 7.1X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 300mm .
