The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon AF-P DX 10-20mm F4.5-5.6G VR 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 Nikon AF-P DX 10-20mm F4.5-5.6G VR with a length of 73mm, is 57mm shorter. Besides being longer, the Sigma 20mm F1.4 DG HSM A also has a larger diameter of 91mm compared to the Nikon AF-P DX 10-20mm F4.5-5.6G VR's 77mm diameter.
Below you can find a scaled side-by-side image of Nikon AF-P DX 10-20mm F4.5-5.6G VR 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 Nikon AF-P DX 10-20mm F4.5-5.6G VR 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. Nikon AF-P DX 10-20mm F4.5-5.6G VR weighs 230g, which means it is 720g (75%) lighter than the Sigma 20mm F1.4 DG HSM A which has a weight of 950g.
Lens Mounts
The Nikon AF-P DX 10-20mm F4.5-5.6G VR has the Nikon F (DX) lens mount whereas the Sigma 20mm F1.4 DG HSM A has the Nikon F (FX) lens mount . Some of the latest released cameras that are compatible with these mounts are Nikon D3500 , Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount and Nikon D6 , Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Canon EF , Sigma SA and Leica L mounts.
Focal Range
Nikon AF-P DX 10-20mm F4.5-5.6G VR has a focal range of 10-20mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
15-30mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 20mm F1.4 DG HSM A 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 .
