FA 20/2.8

General Description
| Product Information | |
|---|---|
| Exact Name | SMC PENTAX-FA 1:2.8 20mm |
| Color | black |
| Year of Introduction | 1995 |
| Catalog Number | 22880 |
| Sold with Hood | — |
| Sold with Case | soft case: S70-70 |
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 10 elements in 9 groups |
| Aperture Range | f/2.8 ~ f/22 |
| Number of Aperture Blades | 6 |
| 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 | 255 g |
| Accessories | |
| Cap | plastic clip-on cap, 67 mm |
| Fitting Hood(s) | screw-on hood: MH-RB67 |
| Fitting Case(s) | soft case: S70-70 |