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 Sigma 16mm F1.4 DC DN E for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sigma 16mm F1.4 DC DN E is the longer of the two lenses at 92mm. The Sony FE 20mm F1.8 G with a length of 85mm, is 7mm shorter. On the other hand, the Sony FE 20mm F1.8 G has a larger diameter of 74mm compared to the Sigma 16mm F1.4 DC DN E's 72mm diameter.
Below you can find a scaled side-by-side image of Sony FE 20mm F1.8 G and Sigma 16mm F1.4 DC DN E 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 Sigma 16mm F1.4 DC DN E Size and Weight The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sony FE 20mm F1.8 G weighs 373g, which means it is 32g (7%) lighter than the Sigma 16mm F1.4 DC DN E which has a weight of 405g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Wideangle Prime Lenses in Sony E Mount for Size Comparison
Lens Mounts
Both the Sony FE 20mm F1.8 G and the Sigma 16mm F1.4 DC DN E has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E1, Sony A7R V and Sony FX30.
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.
Sigma 16mm F1.4 DC DN E is a prime lens with fixed focal lenght of 16mm which has an effective (full-frame 35mm equivalent) focal range of 24mm when used on a APS-C / DX format camera.