Comparison of Canon EF 40mm ƒ/2.8 STM and Olympus 25mm f/2.8 Zuiko Digital [S]ave
| Attribute |  Canon EF 40mm ƒ/2.8 STM × |  Olympus 25mm f/2.8 Zuiko Digital × |
|---|---|---|
| Notes | Optional lens hood: ES-52 | Included Accessories: Lens cap (LC-43), rear cap (LR-1). Screw-in aluminum lens cap, and lens hood optional. |
| Magnification Ratio (x) | 0.18 | 0.19 |
| Filter Size (mm) | 52 | 43 |
| Focus Details | AF/MF with STM (Stepping Motor Technology) | - |
| Closest Focus (m) | 0.3 | 0.2 |
| Diagonal Angle of View (degree) | 57.00 | 47.00 |
| Lens Construction | 6 elements in 4 groups, including 1 aspherical element | 5 elements in 4 groups, including aspherical element |
| Focal Length (mm) | 40.00 | 25.00 |
| APS Equivalent | 64mm | - |
| Brand | Canon | Olympus |
| Image Circle | 35mm | Image Circle |
| Name | Canon EF 40mm ƒ/2.8 STM | Olympus 25mm f/2.8 Zuiko Digital |
| Weight (g) | 130 | 95 |
| Type | Wide Prime ("Pancake") | Standard Prime |
| Aperture (f) | 2.80 - 22.00 | 2.80 - 22.00 |
| Diaphragm Blades | 7 | 7 |
| Diaphragm Blades Type | circular | circular |
| Length (mm) | 22.8 | 23.5 |
| 35mm Equivalent | - | 50mm |
| Diameter (mm) | 68.2 | 64 |
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