M 50/4 Macro

General Description
| Product Information | |
|---|---|
| Exact Name | smc PENTAX-M MACRO 1:4 50mm | 
| Color | black | 
| Year of Introduction | 1977 | 
| Catalog Number | 28160 | 
| Sold with Hood | — | 
| Sold with Case | hard case: smc PENTAX MACRO 4/50 | 
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 4 elements in 3 groups | 
| Aperture Range | f/4 ~ f/32 | 
| Number of Aperture Blades | 5 | 
| Minimum Focusing Distance | 0.23 m | 
| Maximum Magnification | 0.5 X | 
| Special Features | macro lens | 
| Mechanics | |
| Filter Diameter | 49 mm | 
| Maximum Diameter | 63 mm | 
| Length | 43 mm | 
| Weight | 165 g | 
| Accessories | |
| Cap | plastic clip-on cap, 49 mm | 
| Fitting Hood(s) | no hood required | 
| Fitting Case(s) | hard case: smc PENTAX MACRO 4/50 |