| Lens Name | SMC Pentax-M |
| Focal Length | 85mm |
| Diaphram Scale | 2-22 |
| Auto/manual/preset diaphragm | Auto |
| Number of elements and groups | 5/4 |
| Angle of view | 24 |
| Closest focus (cm) | 0.85m |
| Weight (gm) | 250 |
| Length of lens (mm) | 46 |
| Biggest barrel diameter (mm) | 63 |
| Filter size (mm) | 49 |
| Introduced | 1977 |
| Discontinued | 1984 |
| Price when new | ?? |