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 28-300mm F4-7.1 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 28-300mm F4-7.1 is the longer of the two lenses at 126mm. The Sigma 20-200mm F3.5-6.3 with a length of 118mm, is 8mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 77mm.
Below you can find a scaled side-by-side image of Sigma 20-200mm F3.5-6.3 and Tamron 28-300mm F4-7.1 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 28-300mm F4-7.1 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 70g (11%) lighter than the Tamron 28-300mm F4-7.1 which has a weight of 610g.
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 28-300mm F4-7.1 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 28-300mm F4-7.1:
Lens Mounts
Both the Sigma 20-200mm F3.5-6.3 and the Tamron 28-300mm F4-7.1 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 28-300mm F4-7.1 has a focal range of 28-300mm and 10.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 450mm .
