Comparison of Canon EF 40mm ƒ/2.8 STM and Canon EF 50mm f/1.8 II [S]ave
| Attribute |  Canon EF 40mm ƒ/2.8 STM × |  Canon EF 50mm f/1.8 II × |
|---|---|---|
| Magnification Ratio (x) | 0.18 | 0.15 |
| Filter Size (mm) | 52 | 52 |
| Focus Details | AF/MF with STM (Stepping Motor Technology) | Linear extension system with Micromotor |
| Closest Focus (m) | 0.3 | 0.45 |
| Lens Construction | 6 elements in 4 groups, including 1 aspherical element | 6 elements in 5 groups |
| Length (mm) | 22.8 | 41 |
| Focal Length (mm) | 40.00 | 50.00 |
| Diaphragm Blades Type | circular | - |
| Brand | Canon | Canon |
| Image Circle | 35mm | 35mm |
| Name | Canon EF 40mm ƒ/2.8 STM | Canon EF 50mm f/1.8 II |
| Weight (g) | 130 | 130 |
| Type | Wide Prime ("Pancake") | Standard Prime |
| Notes | Optional lens hood: ES-52 | Canon EF mount (plastic) |
| APS Equivalent | 64mm | 80mm |
| Aperture (f) | 2.80 - 22.00 | 1.80 - 22.00 |
| Diaphragm Blades | 7 | 5 |
| Diagonal Angle of View (degree) | 57.00 | 46.00 |
| Diameter (mm) | 68.2 | 68 |
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