| Attribute | Value |
|---|---|
| Lens Construction | 15 elements in 11 groups, including 1 double-sided aspherical, 2 FLD and 5 SLD elements |
| Diameter | 129.5 mm |
| Diagonal Angle of View | 94.50 degree |
| Diaphragm Blades Type | rounded |
| Aperture | 1.40 - 16.00 f |
| Notes | Available AF Mounts: Sigma SA, Canon EF, L-Mount, Nikon F, Sony E; Compatible with Sigma's USB Dock and Mount Conversion Service |
| Magnification Ratio | 0.14 x |
| Closest Focus | 0.28 m |
| Focus Details | HSM (Hypersonic Motor) with full-time manual focus override |
| Length | 91.4 mm |
| Diaphragm Blades | 9 |
| APS Equivalent | 1.5x: 30mm; 1.6x: 32mm |
| Focal Length | 20.00 mm |
| Image Circle | 35mm |
| Brand | Sigma |
| Name | Sigma 20mm ƒ/1.4 DG HSM Art |
| Weight | 963 g |
| Type | Wide Prime |
| 35mm Equivalent | Add |
| Effective Reduction in Aperture | Add |
| Focal Length Multiplier | Add |
| APS-C Equivalent | Add |
| Zoom System | Add |
| Filter Size | Add |
| Front Element Rotation | Add |