| Lens Name | SMC Pentax-A |
| Focal Length | 100mm |
| Diaphram Scale | 2.8-22 |
| Auto/manual/preset diaphragm | Auto |
| Number of elements and groups | 7/7 |
| Angle of view | 18 |
| Closest focus (cm) | 0.31m |
| Weight (gm) | 470 |
| Length of lens (mm) | 93 |
| Biggest barrel diameter (mm) | 74 |
| Filter size (mm) | 58 |
| Introduced | 1985 |
| Discontinued | 1989 |
| Price when new | ?? |