The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 25-200mm f2.8-5.6 Di and the Sigma 20-200mm F3.5-6.3 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 25-200mm f2.8-5.6 Di is the longer of the two lenses at 122mm. The Sigma 20-200mm F3.5-6.3 with a length of 116mm, is 6mm shorter. On the other hand, the Sigma 20-200mm F3.5-6.3 has a larger diameter of 77mm compared to the Tamron 25-200mm f2.8-5.6 Di's 76mm diameter.
Below you can find a scaled side-by-side image of Tamron 25-200mm f2.8-5.6 Di and Sigma 20-200mm F3.5-6.3 to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 25-200mm f2.8-5.6 Di and the Sigma 20-200mm F3.5-6.3 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 550g, 4% (25g) lighter than the Tamron 25-200mm f2.8-5.6 Di's weight of 575g.
Filter Threads
The Tamron 25-200mm f2.8-5.6 Di has a filter size of 67mm whereas the Sigma 20-200mm F3.5-6.3 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 67mm filters that we recommend you to consider for the Tamron 25-200mm f2.8-5.6 Di:
And these are the 72mm filters that we recommend for the Sigma 20-200mm F3.5-6.3:
Lens Mounts
The Tamron 25-200mm f2.8-5.6 Di has the Sony E lens mount whereas the Sigma 20-200mm F3.5-6.3 has the Leica L lens mount . Some of the latest released cameras that are compatible with these mounts are Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount and Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Sony E mount.
Focal Range
Tamron 25-200mm f2.8-5.6 Di has a focal range of 25-200mm and
8.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
37.5 - 300mm .
On the other hand, the 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 .
