M 20/4
General Description
| Product Information | |
|---|---|
| Exact Name | smc PENTAX-M 1:4 20mm |
| Color | black |
| Year of Introduction | 1977 |
| Catalog Number | 22830 |
| Sold with Hood | — |
| Sold with Case | hard case: SMC PENTAX 4/20 |
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 8 elements in 8 groups |
| Aperture Range | f/4 ~ f/22 |
| Number of Aperture Blades | 5 |
| Minimum Focusing Distance | 0.25 m |
| Maximum Magnification | 0.12 X |
| Mechanics | |
| Filter Diameter | 49 mm |
| Maximum Diameter | 63 mm |
| Length | 30 mm |
| Weight | 150 g |
| Accessories | |
| Cap | plastic clip-on cap, 52 mm |
| Fitting Hood(s) | clip-on hood: PH-S49 |
| Fitting Case(s) | hard case: SMC PENTAX 4/20 |
