Comparison of Canon EF 40mm ƒ/2.8 STM and Canon EF-S 24mm ƒ/2.8 STM [S]ave
| Attribute |  Canon EF 40mm ƒ/2.8 STM × |  Canon EF-S 24mm ƒ/2.8 STM × |
|---|---|---|
| Magnification Ratio (x) | 0.18 | 0.27 |
| Filter Size (mm) | 52 | 52 |
| Focus Details | AF/MF with STM (Stepping Motor Technology) | Stepping motor (STM) for smooth, near silent AF when shooting stills and movies; full-time manual focus |
| Closest Focus (m) | 0.3 | 0.16 |
| Lens Construction | 6 elements in 4 groups, including 1 aspherical element | 6 elements in 5 groups, including 1 aspherical element |
| Length (mm) | 22.8 | 22.8 |
| Focal Length (mm) | 40.00 | 24.00 |
| Diaphragm Blades Type | circular | rounded |
| Brand | Canon | Canon |
| Image Circle | 35mm | APS-C |
| Name | Canon EF 40mm ƒ/2.8 STM | Canon EF-S 24mm ƒ/2.8 STM |
| Weight (g) | 130 | 125 |
| Type | Wide Prime ("Pancake") | Wide Prime |
| Notes | Optional lens hood: ES-52 | - |
| APS Equivalent | 64mm | 38mm |
| Aperture (f) | 2.80 - 22.00 | 2.80 - 22.00 |
| Diaphragm Blades | 7 | 7 |
| Diagonal Angle of View (degree) | 57.00 | 34.90 |
| Diameter (mm) | 68.2 | 68.2 |
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