The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Laowa 17mm f4 TS 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 Laowa 17mm f4 TS with a length of 111mm, is 19mm shorter. On the other hand, the Laowa 17mm f4 TS has a larger diameter of 93mm compared to the Sigma 20mm F1.4 DG HSM A's 91mm 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. Laowa 17mm f4 TS weighs 810g, which means it is 140g (14%) 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 Perspective Control Prime Lenses in Leica L Mount for size comparison purposes.
Ultra-Wideangle Lenses in Leica L Mount for Size Comparison
Lens Mounts
Both the Laowa 17mm f4 TS 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.
Laowa 17mm f4 TS is also available in the Sony E , Nikon Z and Canon RF mounts.
Sigma 20mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX) and Sigma SA mounts.
Focal Range
Laowa 17mm f4 TS is a prime lens with fixed focal lenght of 17mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
25.5mm.
On the other hand, the Sigma 20mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 20mm.
