The smc DA 50mm f/1.8 Lens from Pentax is a fast f/1.8 lens for cameras with a Pentax K mount. In full-frame (35mm) format, this is considered a "normal" lens. Mounted to a camera with an APS-C sensor, this lens gives an angle of view equivalent to a 76.5mm telephoto lens--ideal for portraits. The wide f/1.8 aperture makes this an essential lens for working in low light, and it also delivers beautiful bokeh (the out-of-focus portion of a photograph). This lightweight (4.3 oz) lens is very compact--just 1.5" (3.8 cm) long. The addition of Pentax Super Protect (SP) coating to the lens helps prevent dust, water, grease and other substances from attaching themselves to a lens and degrading image quality.
| Performance | |
|---|---|
| Focal Length |
50 mm Comparable APS-C Focal Length: 76.5 mm |
| Aperture |
Maximum: f/1.8 Minimum: f/22 |
| Camera Mount Type | Pentax K |
| Format Compatibility |
35mm Film / Full-Frame Digital Sensor DSLR (APS-C Sensor) |
| Angle of View | 31.5° |
| Minimum Focus Distance | 1.48' (45.11 cm) |
| Magnification | 0.15x |
| Groups/Elements | 5/6 |
| Diaphragm Blades | 7 |
| Features | |
|---|---|
| Image Stabilization | No |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | Front: 52 mm |
| Dimensions (DxL) | Approx. 2.5 x 1.5" (6.35 x 3.81 cm) |
| Weight | 4.3 oz (122 g) |