The new Sigma 14mm F1.4 DG DN is an impressive ultra-wide angle fast lens, perfect for astrophotography scenarios but it is quiet large and heavy at the same time. For the Leica L mount, it doesn't have a direct competitor but for the Sony E mount, the popular Sony FE 14mm F1.8 GM has similar optical specs. It is half-stop slower but significantly smaller and lighter than the new Sigma.
Here is a size comparison of these two lenses followed by a specs comparison:
Sigma 14mm F1.4 vs Sony FE 14mm F1.8 Size Comparison
Sigma 14mm F1.4 vs Sony FE 14mm F1.8 Size Comparison
Sigma 14mm F1.4 vs Sony FE 14mm F1.8 Specs and Feature Comparison
FEATURE and SPECS COMPARISON Model Sigma 14mm F1.4 DG DN Sony FE 14mm F1.8 GM Lens Type Prime Prime Lens Mount Sony E Sony E Focal Length 14mm 14mm Max Format 35mm FF 35mm FF Number of Diaphragm Blades 11 9 Optical Elements 19 14 Optical Groups 15 11 Minimum Focus Distance 0.3m 0.25m Max Magnification 0.08x 0.1x Weight 1170g 460g Length 150mm 100mm Diameter 101mm 83mm Weather Sealing Aperture Ring Price Amazon , B&H Photo Amazon , B&H Photo