M 100/2.8

General Description
| Product Information | |
|---|---|
| Exact Name | smc PENTAX-M 1:2.8 100mm |
| Color | black |
| Year of Introduction | 1977 |
| Catalog Number | 23660 |
| Sold with Hood | — |
| Sold with Case | hard case: smc PENTAX 2.8/100 |
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 5 elements in 5 groups |
| Aperture Range | f/2.8 ~ f/22 |
| Number of Aperture Blades | 6 |
| Minimum Focusing Distance | 1.0 m |
| Maximum Magnification | unknown |
| Mechanics | |
| Filter Diameter | 49 mm |
| Maximum Diameter | 63 mm |
| Length | 56 mm |
| Weight | 225 g |
| Accessories | |
| Cap | plastic clip-on cap, 49 mm |
| Fitting Hood(s) | screw-on hood: PH-R49 clip-on hood: SMC PENTAX 1:2 85mm 1:2.8-4 100mm |
| Fitting Case(s) | hard case: smc PENTAX 2.8/100 |