| Optical specification | |
| Lens construction | 12 elements in 9 groups |
| Angle of view | 76° - 29° (with *istD, *istDS body) |
| Minimum aperture | F22 at 18mm; F38 at 55mm |
| Minimum focusing distance | 0.25m |
| Maximum magnification | 0.34X |
| Physical specification | |
| Lens mount | PENTAX KAF mount |
| Aperture control | Automatic |
| Number of diaphragm blades | 6 |
| Metering system | TTL open-aperture metering |
| Filter size | 52mm |
| Dimensions (diameter x length) | 68mm x 67.5mm |
| Weight | 225g |
