The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 16-35mm F2.8 GM II and the Sigma 20mm F1.4 DG DN A 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. Sony FE 16-35mm F2.8 GM II is the longer of the two lenses at 112mm. The Sigma 20mm F1.4 DG DN A with a length of 111mm, is 1mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 88mm.
Below you can find a scaled side-by-side image of Sony FE 16-35mm F2.8 GM II and Sigma 20mm F1.4 DG DN A to get a better idea of how their sizes compare in real life.
Comparison image of the Sony FE 16-35mm F2.8 GM II and the Sigma 20mm F1.4 DG DN A 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 16-35mm F2.8 GM II weighs 547g, which means it is 88g (13%) lighter than the Sigma 20mm F1.4 DG DN A which has a weight of 635g.
Filter Threads
Both the Sony FE 16-35mm F2.8 GM II and the Sigma 20mm F1.4 DG DN A have the same Filter thread size of 82mm .
Below are links to the 82mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sony FE 16-35mm F2.8 GM II and the Sigma 20mm F1.4 DG DN A 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 .
Sigma 20mm F1.4 DG DN A is also available in Leica L mount.
Focal Range
Sony FE 16-35mm F2.8 GM II has a focal range of 16-35mm and
2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
24 - 52.5mm .
On the other hand, the Sigma 20mm F1.4 DG DN A 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 36mm .