| Maker | Pentax |
|---|---|
| Lens mount(s) | Pentax 645AF2 |
| Technical data | |
| Type | Prime |
| Focus drive | Ultrasonic |
| Focal length | 25mm |
| Aperture (max/min) | f/4.0 |
| Close focus distance | 0.40 metres (1.3 ft) |
| Max. magnification | 0.11 |
| Diaphragm blades | 9 |
| Construction | 12 elements in 8 groups |
| Features | |
| Manual focus override |  Yes |
| Weather-sealing | Yes |
| Lens-based stabilization |  No |
| Aperture ring | No |
| Physical | |
| Max. length | 140 millimetres (5.5 in) |
| Diameter | 90 millimetres (3.5 in) |
| Weight | 1,070 grams (2.36 lb) |
| Filter diameter | 40.5mm |
| Accessories | |
| Lens hood | Built-in |
The smc Pentax-D FA 645 25mm F4 AL (IF) SDM AW is an interchangeable camera lens for the Pentax 645 medium format system.
References
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