Comparison of Olympus 17mm ƒ/1.8 M.Zuiko Digital and Sigma 19mm F2.8 EX DN [S]ave
| Attribute |  Sigma 19mm F2.8 EX DN × |  Olympus 17mm ƒ/1.8 M.Zuiko Digital × |
|---|---|---|
| Diagonal Angle of View (degree) | 59.30 | 65.00 |
| Aperture (f) | 2.80 - 22.00 | 1.80 - 22.00 |
| Diaphragm Blades Type | rounded | circular |
| Filter Size (mm) | 46 | 46 |
| Notes | Lens mounts: Sony E-Mount, Micro Four Thirds. Sigma's Super Multi-Layer Coating. | Includes front and rear plastic lens caps, instruction manual. Optional LH-48B metal lens hood, LC-48B metal lens cap available. |
| Focus Details | Inner focusing with linear AF motor | - |
| Type | Wide Prime | Wide Prime |
| Diaphragm Blades | 7 | 7 |
| Lens Construction | 8 elements in 6 groups, including 3 aspherical elements | 9 elements in 6 groups, including 1 high refractive and 3 aspherical elements (with a Dual Super aspherical element) |
| Image Circle | APS-C | Image Circle |
| Focal Length (mm) | 19.00 | 17.00 |
| Brand | Sigma | Olympus |
| Name | Sigma 19mm F2.8 EX DN | Olympus 17mm ƒ/1.8 M.Zuiko Digital |
| Weight (g) | 140 | 120 |
| Diameter (mm) | 60.6 | 57.5 |
| Length (mm) | 45.7 | 35.5 |
| 35mm Equivalent | - | 34mm |
| Magnification Ratio (x) | 0.14 | 0.08 |
| APS Equivalent | 1.5x: 28.5mm; 2.0x: 38mm | - |
| Closest Focus (m) | 0.2 | 0.25 |
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