| Lens Specifications | |
|---|---|
| Name | Pentax SMC P-FA 31mm f/1.8 AL Limited |
| Image Circle | 35mm |
| Type | Wide Prime |
| Focal Length | 31mm |
| APS Equivalent | 46.5mm |
| Max Aperture | f/1.8 |
| Min Aperture | f/22 |
| Diaphragm Blades | ? |
| Lens Construction | 9 elements in 7 groups, including 1 aspherical element |
| Diagonal Angle of View(Based on image circle) | 70 degrees |
| Focus Details | |
| Front Element Rotation | ? |
| Zoom System | n/a |
| Closest Focus | 30.5cm / 12 in. |
| Magnification Ratio | 0.16x / 1:6.3 |
| Filter Size | 58mm |
| Dimensions(Length x Diameter) | 68.5mm x 65.0mm / 2.7 in. x 2.6 in. |
| Weight | 345g / 12.2 oz |
| Notes | |
| Typical Online Price | US$870 |
