The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-28mm F2.8 Di III and the Sigma 24-70mm F2.8 II 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 24-70mm F2.8 II is the longer of the two lenses at 122mm. The Tamron 17-28mm F2.8 Di III with a length of 99mm, is 23mm shorter. Besides being longer, the Sigma 24-70mm F2.8 II also has a larger diameter of 88mm compared to the Tamron 17-28mm F2.8 Di III's 73mm diameter.
Below you can find a scaled side-by-side image of Tamron 17-28mm F2.8 Di III and Sigma 24-70mm F2.8 II to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 17-28mm F2.8 Di III and the Sigma 24-70mm F2.8 II 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. Tamron 17-28mm F2.8 Di III weighs 420g, which means it is 315g (42%) lighter than the Sigma 24-70mm F2.8 II which has a weight of 735g.
Filter Threads
The Tamron 17-28mm F2.8 Di III has a filter size of 67mm whereas the Sigma 24-70mm F2.8 II has a 82mm 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 17-28mm F2.8 Di III:
And these are the 82mm filters that we recommend for the Sigma 24-70mm F2.8 II:
Lens Mounts
Both the Tamron 17-28mm F2.8 Di III and the Sigma 24-70mm F2.8 II 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 .
Leica L mount.
Focal Range
Tamron 17-28mm F2.8 Di III has a focal range of 17-28mm and
1.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
25.5 - 42mm .
On the other hand, the Sigma 24-70mm F2.8 II has a focal range of 24-70mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36 - 105mm .
