The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 20mm F1.8 G and the Tamron 17-28mm F2.8 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. Tamron 17-28mm F2.8 Di III is the longer of the two lenses at 99mm. The Sony FE 20mm F1.8 G with a length of 85mm, is 14mm shorter. On the other hand, the Sony FE 20mm F1.8 G has a larger diameter of 74mm compared to the Tamron 17-28mm F2.8 Di III's 73mm diameter.
Below you can find a scaled side-by-side image of Sony FE 20mm F1.8 G and Tamron 17-28mm F2.8 Di III to get a better idea of how their sizes compare in real life.
Comparison image of the Sony FE 20mm F1.8 G and the Tamron 17-28mm F2.8 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. Sony FE 20mm F1.8 G weighs 373g, which means it is 47g (11%) lighter than the Tamron 17-28mm F2.8 Di III which has a weight of 420g.
Filter Threads
Both the Sony FE 20mm F1.8 G and the Tamron 17-28mm F2.8 Di III have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sony FE 20mm F1.8 G and the Tamron 17-28mm F2.8 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
Sony FE 20mm F1.8 G is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
30mm .
On the other hand, the 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 .
