| Maker | Pentax |
|---|---|
| Technical data | |
| Type | Prime |
| Focal length | 50mm |
| Focal length (35mm equiv.) | 75mm |
| Crop factor | 1.0 |
| Aperture (max/min) | f/1.8 / f/22 |
| Close focus distance | 0.45 metres (1.5 ft) |
| Max. magnification | 0.15x |
| Diaphragm blades | 7, rounded |
| Construction | 6 elements in 5 groups |
| Features | |
| Application | Normal prime |
| Physical | |
| Max. length | 38.5 millimetres (1.52 in) |
| Diameter | 63.0 millimetres (2.48 in) |
| Weight | 122 grams (4.3 oz) |
| Filter diameter | 52mm |
| Accessories | |
| Lens hood | RH-RA 52mm |
| Case | S70-70 |
| Angle of view | |
| Diagonal | 46° (full frame) 31.5° (APS-C) |
| History | |
| Introduction | 2012 |
| Retail info | |
| MSRP | $249.95 USD |
The SMC Pentax-DA 50mm f/1.8 lens is a normal prime lens for the Pentax K-mount. The 75mm equivalent focal length on APS-C cameras and fast f/1.8 aperture make it well suited for portrait photography. It uses a simple double-Gauss design of 6 elements in 5 groups.
Similar lenses from other manufacturers include the Canon EF 50mm f/1.8 II and Nikon AF Nikkor 50 mm f/1.8D.
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