Comparison of Zeiss 21mm f/2.8 Loxia 2.8/21 and Sigma 16mm f/1.4 DC DN Contemporary [S]ave
| Attribute |  Zeiss 21mm f/2.8 Loxia 2.8/21 × |  Sigma 16mm f/1.4 DC DN Contemporary × |
|---|---|---|
| Filter Size (mm) | 52 | 67 |
| Notes | Sony E-Mount (full frame); Weather-resistant lens mount gasket; Included Accessories: Lens hood, front and rear lens caps, de-click key. | Lens mounts: Sony E-Mount, Micro Four-Thirds, Canon EF-M. Dust- and splash-proof design; Lens hood (LH716-01) included. |
| Closest Focus (m) | 0.25 | 0.25 |
| Magnification Ratio (x) | 0.13 | 0.1 |
| Type | Wide Prime | Wide Prime |
| Length (mm) | 85 | 92.3 |
| APS Equivalent | 1.5x: 31.5mm | 1.5x: 24mm; 2.0x: 32mm |
| Diagonal Angle of View (degree) | 91.00 | 83.20 |
| Image Circle | 35mm | APS-C |
| Focal Length (mm) | 21.00 | 16.00 |
| Brand | Carl-zeiss | Sigma |
| Name | Zeiss 21mm f/2.8 Loxia 2.8/21 | Sigma 16mm f/1.4 DC DN Contemporary |
| Weight (g) | 394 | 405 |
| Aperture (f) | 2.80 - 22.00 | 1.40 - 16.00 |
| Diaphragm Blades | 10 | 9 |
| Diaphragm Blades Type | rounded | rounded |
| Lens Construction | 11 elements in 9 groups, including 1 aspherical and 4 anomalous partial dispersion elements; Zeiss T* anti-reflective coating | 16 elements in 13 groups, including 3 FLD, 2 SLD and 2 aspherical elements |
| Diameter (mm) | 62.1 | 72.2 |
| Focus Details | Manual focus only, with large 180 degree focus throw, engraved distance and DOF scales | Inner focusing with stepping motor |
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