A 20/2.8
General Description
| Product Information | ||
|---|---|---|
| Exact Name | smc PENTAX-A 1:2.8 20mm | |
| Color | black | |
| Year of Introduction | 1985 | |
| Sales Variations | ||
| Catalog Number | 22870 | 22875 |
| Sold with Hood | — | — |
| Sold with Case | hard case: HD-100 | — |
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 10 elements in 9 groups |
| Aperture Range | f/2.8 ~ f/22 |
| Number of Aperture Blades | 5 |
| Minimum Focusing Distance | 0.25 m |
| Maximum Magnification | 0.12 X |
| Mechanics | |
| Filter Diameter | 67 mm |
| Maximum Diameter | 70 mm |
| Length | 43.5 mm |
| Weight | 245 g |
| Accessories | |
| Cap | plastic clip-on cap, 67 mm |
| Fitting Hood(s) | screw-on hood: MH-RB67 |
| Fitting Case(s) | hard case: HD-100 |
