Comparison of Olympus 25mm ƒ/1.8 M.Zuiko Digital and Sigma 30mm F2.8 EX DN [S]ave
| Attribute |  Olympus 25mm ƒ/1.8 M.Zuiko Digital × |  Sigma 30mm F2.8 EX DN × |
|---|---|---|
| Diagonal Angle of View (degree) | 47.00 | 39.60 |
| Aperture (f) | 1.80 - 22.00 | 2.80 - 22.00 |
| Diaphragm Blades Type | circular | rounded |
| Filter Size (mm) | 46 | 46 |
| Notes | Available in black or silver. Included accessories: Lens Cap (LC-46), Lens Rear Cap (LR-2), Lens Hood (LH-49B), Decoration Ring (DR-49). | Lens mounts: Sony E-Mount, Micro Four Thirds. Sigma's Super Multi-Layer Coating. |
| Focus Details | - | Inner focusing with linear AF motor |
| Type | Standard Prime | Standard Prime |
| Diaphragm Blades | 7 | 7 |
| Lens Construction | 9 elements in 7 groups, including 2 aspherical elements | 7 elements in 5 groups, including 2 aspherical elements |
| Image Circle | Image Circle | APS-C |
| Focal Length (mm) | 25.00 | 30.00 |
| Brand | Olympus | Sigma |
| Name | Olympus 25mm ƒ/1.8 M.Zuiko Digital | Sigma 30mm F2.8 EX DN |
| Weight (g) | 136 | 135 |
| Diameter (mm) | 56 | 60.6 |
| Length (mm) | 41 | 38.6 |
| 35mm Equivalent | 50mm | - |
| Magnification Ratio (x) | 0.12 | 0.12 |
| APS Equivalent | - | 1.5x: 45mm; 2.0x: 60mm |
| Closest Focus (m) | 0.24 | 0.3 |
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