The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7Artisans FF 18mm f5.6 L and the Sigma 20mm F1.4 DG HSM 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. Sigma 20mm F1.4 DG HSM A is the longer of the two lenses at 130mm. The 7Artisans FF 18mm f5.6 L with a length of 32mm, is 98mm shorter. Besides being longer, the Sigma 20mm F1.4 DG HSM A also has a larger diameter of 91mm compared to the 7Artisans FF 18mm f5.6 L's 61mm diameter.
Below you can find a scaled side-by-side image of 7Artisans FF 18mm f5.6 L and Sigma 20mm F1.4 DG HSM A to get a better idea of how their sizes compare in real life.
Comparison image of the 7Artisans FF 18mm f5.6 L and the Sigma 20mm F1.4 DG HSM 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. 7Artisans FF 18mm f5.6 L weighs 146g, which means it is 804g (84%) lighter than the Sigma 20mm F1.4 DG HSM A which has a weight of 950g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica L Mount for size comparison purposes.
Ultra-Wideangle Leica L Mount
Lens Mounts
Both the 7Artisans FF 18mm f5.6 L and the Sigma 20mm F1.4 DG HSM A has the same Leica L lens mount . Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE .
Canon EF , Nikon F (FX) and Sigma SA mounts.
Focal Range
7Artisans FF 18mm f5.6 L is a prime lens with fixed focal lenght of 18mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
27mm .
On the other hand, the Sigma 20mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 20mm.
