The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 14mm F1.8 GM and the Sigma 35mm F1.2 DG DN Art 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 35mm F1.2 DG DN Art is the longer of the two lenses at 136mm. The Sony FE 14mm F1.8 GM with a length of 100mm, is 36mm shorter. Besides being longer, the Sigma 35mm F1.2 DG DN Art also has a larger diameter of 88mm compared to the Sony FE 14mm F1.8 GM's 83mm diameter.
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 14mm F1.8 GM weighs 460g, which means it is 630g (57%) lighter than the Sigma 35mm F1.2 DG DN Art which has a weight of 1090g.
Lens Mounts
Both the Sony FE 14mm F1.8 GM and the Sigma 35mm F1.2 DG DN Art has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 35mm F1.2 DG DN Art is also available in Leica L mount.
Focal Range
Sony FE 14mm F1.8 GM is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
21mm.
On the other hand, the Sigma 35mm F1.2 DG DN Art is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 52.5mm.