The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-50mm f4 Di III VXD and the Sony FE 20-70mm F4 G 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 17-50mm f4 Di III VXD is the longer of the two lenses at 114mm. The Sony FE 20-70mm F4 G with a length of 99mm, is 15mm shorter. On the other hand, the Sony FE 20-70mm F4 G has a larger diameter of 79mm compared to the Tamron 17-50mm f4 Di III VXD's 75mm diameter.
Below you can find a scaled side-by-side image of Tamron 17-50mm f4 Di III VXD and Sony FE 20-70mm F4 G to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 17-50mm f4 Di III VXD and the Sony FE 20-70mm F4 G 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 17-50mm f4 Di III VXD weighs 460g, which means it is 28g (5%) lighter than the Sony FE 20-70mm F4 G which has a weight of 488g.
Filter Threads
The Tamron 17-50mm f4 Di III VXD has a filter size of 67mm whereas the Sony FE 20-70mm F4 G 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 17-50mm f4 Di III VXD:
And these are the 72mm filters that we recommend for the Sony FE 20-70mm F4 G:
Lens Mounts
Both the Tamron 17-50mm f4 Di III VXD and the Sony FE 20-70mm F4 G 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
Tamron 17-50mm f4 Di III VXD has a focal range of 17-50mm and
3.0X 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 - 75mm .
On the other hand, the Sony FE 20-70mm F4 G has a focal range of 20-70mm and 3.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 30 - 105mm .
