The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 16mm F1.4 DC DN L and the Sony FE 14mm F1.8 GM 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 Sigma 16mm F1.4 DC DN L and Sony FE 14mm F1.8 GM 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, which means it is 55g (11%) lighter than the Sony FE 14mm F1.8 GM which has a weight of 460g.
Lens Mounts
The Sigma 16mm F1.4 DC DN L has the Leica L lens mount whereas the Sony FE 14mm F1.8 GM has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Leica TL2, Leica TL and Leica T Typ 701 for the Leica L Mount and Sony A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount.
Focal Range
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.
On the other hand, the 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.