Table of Contents
Pentax-M SMC 28mm f/2
Summary
The SMC Pentax-M 28mm f/2 is a fast, manual-focus wide-angle prime lens for Pentax K-mount 35mm and full-frame digital SLRs, produced from 1980 to 1984. It features an 8-element/7-group optical design, a 6-blade automatic diaphragm, and Pentax’s Super Multi-Coating (SMC) for enhanced contrast and flare resistance. As the successor to the K-series 28mm f/2, it offers a more compact form while retaining excellent optical performance. With a bright f/2 maximum aperture, it excels in low-light conditions and delivers shallow depth-of-field with smooth bokeh—especially from f/2.8 to f/5.6. The lens focuses down to 0.3m, provides a 0.12× magnification, and uses a 49mm filter thread. It weighs 215g and measures 63 × 41.5mm, making it a solid yet portable choice for street, landscape, and environmental portrait photography.
Tech Specs
| Manufacturer | Pentax |
| Series | M Series Prime |
| Model | SMC |
| Focal Length | 28mm |
| Max Aperture | f/2 |
| Min Aperture | f/22 |
| Format | Full-Frame |
| Image Circle | - |
| Minimum Focus | 30cm |
| Focus Rotation | ° |
| Iris Blades | 6 |
| Optical Design | 8/7 |
| Squeeze | none |
| Front Diameter | 63mm |
| Filter Thread | 49mm |
| Focus/Zoom Rod | none |
| Native Mount | Pentax K |
| Data Protocol | none |
| Length | 41.5mm |
| Weight | 215g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date: 1980
Launch Price:
Design Revisions:
Service
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Service Manual: (Insert link to manual here)
Full CLA: TBD hrs.
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Cine-Mod
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Focus Ring O.D.: -
Zoom Ring O.D.: -
Iris Ring O.D.: -
De-click Y/N: -
Additional Notes:
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