Comparison of Nikon 20mm f/2.8D AF Nikkor and Sigma 24mm f/3.5 DG DN Contemporary [S]ave
| Attribute |  Nikon 20mm f/2.8D AF Nikkor × |  Sigma 24mm f/3.5 DG DN Contemporary × |
|---|---|---|
| Filter Size (mm) | 62 | 55 |
| Aperture (f) | 2.80 - 22.00 | 3.50 - 22.00 |
| Closest Focus (m) | 0.25 | 0.11 |
| Magnification Ratio (x) | 0.12 | 0.5 |
| Type | Wide Prime | Wide Prime |
| Focus Details | Close Range Correction (CRC) | Smooth, quiet and high-speed AF via stepping motor |
| APS Equivalent | 30mm | 1.5x: 36mm |
| Notes | - | Available AF Mounts: L-Mount, Sony E-Mount |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 20.00 | 24.00 |
| Brand | Nikon | Sigma |
| Name | Nikon 20mm f/2.8D AF Nikkor | Sigma 24mm f/3.5 DG DN Contemporary |
| Weight (g) | 269 | 225 |
| Diagonal Angle of View (degree) | 94.00 | 84.10 |
| Diaphragm Blades | 7 | 7 |
| Diameter (mm) | 69 | 64 |
| Length (mm) | 69 | 48.8 |
| Diaphragm Blades Type | - | rounded |
| Lens Construction | 12 elements in 9 groups | 10 elements in 8 groups, with 1 SLD glass and 3 aspherical lenses |
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