Comparison of Canon EF 28mm f/2.8 and Pentax SMC P-FA 28mm f/2.8 AL [S]ave
| Attribute |  Canon EF 28mm f/2.8 × |  Pentax SMC P-FA 28mm f/2.8 AL × |
|---|---|---|
| Brand | Canon | Pentax |
| Name | Canon EF 28mm f/2.8 | Pentax SMC P-FA 28mm f/2.8 AL |
| Focal Length (mm) | 28.00 | 28.00 |
| Image Circle | 35mm | 35mm |
| Diaphragm Blades | 5 | - |
| APS Equivalent | 45mm | 42mm |
| Focus Details | Focus Details | - |
| Length (mm) | 42 | 40.6 |
| Magnification Ratio (x) | 0.13 | 0.11 |
| Closest Focus (m) | 0.3 | 0.3 |
| Filter Size (mm) | 52 | 49 |
| Aperture (f) | 2.80 - 22.00 | 2.80 - 22.00 |
| Diagonal Angle of View (degree) | 75.00 | 75.00 |
| Weight (g) | 185 | 185 |
| Lens Construction | 5 elements in 5 groups, including 1 aspherical element | 5 elements in 5 groups |
| Type | Wide Prime | Wide Prime |
| Diameter (mm) | 67 | 63.5 |
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