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 16mm F1.4 DC DN L 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 14mm F1.8 GM is the longer of the two lenses at 100mm. The Sigma 16mm F1.4 DC DN L with a length of 92mm, is 8mm shorter. Besides being longer, the Sony FE 14mm F1.8 GM also has a larger diameter of 83mm compared to the Sigma 16mm F1.4 DC DN L's 72mm diameter.
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Below you can find a scaled side-by-side image of Sony FE 14mm F1.8 GM and Sigma 16mm F1.4 DC DN L to get a better idea of how their sizes compare in real life.
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. Sigma 16mm F1.4 DC DN L weighs 405g, 11% (55g) lighter than the Sony FE 14mm F1.8 GM's weight of 460g.
Lens Mounts
The Sony FE 14mm F1.8 GM has the Sony E lens mount whereas the Sigma 16mm F1.4 DC DN L has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount and Leica TL2, Leica TL and Leica T Typ 701 for the 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 16mm F1.4 DC DN L 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.