Comparison of Pentax SMC P-FA 24mm f/2 and Pentax SMC P-FA 31mm f/1.8 AL Limited [S]ave
| Attribute |  Pentax SMC P-FA 24mm f/2 × |  Pentax SMC P-FA 31mm f/1.8 AL Limited × |
|---|---|---|
| Type | Wide Prime | Wide Prime |
| Magnification Ratio (x) | - | 0.16 |
| Name | Pentax SMC P-FA 24mm f/2 | Pentax SMC P-FA 31mm f/1.8 AL Limited |
| Weight (g) | 405 | 345 |
| Image Circle | 35mm | 35mm |
| Brand | Pentax | Pentax |
| APS Equivalent | 36mm | 46.5mm |
| Focal Length (mm) | 24.00 | 31.00 |
| Closest Focus (m) | 0.3 | 0.3 |
| Lens Construction | 11 elements in 9 groups | 9 elements in 7 groups, including 1 aspherical element |
| Filter Size (mm) | 67 | 58 |
| Aperture (f) | 2.00 - 22.00 | 1.80 - 22.00 |
| Diagonal Angle of View (degree) | 84.00 | 70.00 |
| Diameter (mm) | 74 | 65 |
| Length (mm) | 66 | 68.5 |
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