The smc Pentax 31mm f/1.8 FA Limited wide angle lens is a high-performance fast optic for discriminating Pentax shooters. Fit and finish are on par with the world's best, and the nine-bladed aperture diaphragm renders unfocused highlights in a smooth, creamy palette of blurred color. This lens incorporates a glass-molded aspherical lens elements to minimize spherical aberrations. The FA Limited series features full-frame image coverage with full automatic and manual aperture control, and offers incredible sharpness and image quality made specifically for Pentax DSLR cameras.
| Performance | |
|---|---|
| Focal Length |
31 mm Comparable APS-C Focal Length: 46.5 mm |
| Aperture |
Maximum: f/1.8 Minimum: f/22 |
| Camera Mount Type | Pentax K |
| Format Compatibility |
35mm Film / Full-Frame Digital Sensor Pentax Digital (APS-C) |
| Angle of View | 70° |
| Minimum Focus Distance | 1.00' (30.48 cm) |
| Magnification | 0.16x |
| Maximum Reproduction Ratio | 1:6.25 |
| Groups/Elements | 7/9 |
| Diaphragm Blades | 9 |
| Features | |
|---|---|
| Image Stabilization | No |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | 58 mm |
| Dimensions (DxL) | Approx. 2.6 x 2.7" (6.60 x 6.86 cm) |
| Weight | 12.2 oz (346 g) |