A 50/2.8 Macro
General Description
This lens employs floating elements, a construction used to achieve better optical performance at ALL focus distances. The floating group is the one directly behind the front lens. Relative to the other lens elements it is moved faster near infinity than at close focus.
| Product Information | |
|---|---|
| Exact Name | smc PENTAX-A MACRO 1:2.8 50mm |
| Color | black |
| Year of Introduction | 1984 |
| Catalog Number | 28190 |
| Sold with Hood | — |
| Sold with Case | hard case: HA-90 |
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 6 elements in 4 groups |
| Aperture Range | f/2.8 ~ f/22 |
| Number of Aperture Blades | 6 |
| Minimum Focusing Distance | 0.24 m |
| Maximum Magnification | 0.5 X |
| Special Features | floating elements, macro lens |
| Mechanics | |
| Filter Diameter | 49 mm |
| Maximum Diameter | 63 mm |
| Length | 50 mm |
| Weight | 220 g |
| Accessories | |
| Cap | plastic clip-on cap, 49 mm |
| Fitting Hood(s) | no hood required |
| Fitting Case(s) | hard case: HA-90 |
