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| SMC Pentax-M Macro 1:4 50mm - Front view | ||
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| Manufacturer | Asahi Opt. Co. Japan |
| Lens name | SMC Pentax-M Macro 1:4 50mm |
| Lens mount | Pentax K bayonet |
| Color | Black |
| Date | 1977 - 1984 |
| Minimum aperture | 32 |
| Angle of view | 46° |
| Lens construction (Group/Elements) | 3 / 4 |
| Min. Focusing distance (m.) | 0,234 |
| Diameter (ø) x Lenght (mm.) | 63 x 42.5 |
| Weight (g.) | 160 |
| Filter Size (mm.) | 49 |
| Diaphragm | FA |
| N° aperture blades | 5 |
| Lens hood | Optional - Round or Square Lens hood |
| Optical scheme | |
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| Save The Silver - Black And White Photography | © Copyright Roberto Mura 2006. |