Table of Contents
Pentax SMC 28mm f/3.5 Shift
Summary
The SMC Pentax 28mm f/3.5 Shift is a rare and specialized manual-focus wide-angle lens introduced in 1975 and produced until 2004, designed for full-frame K-mount film and digital SLRs. It was Pentax’s only shift lens, built to correct perspective distortion—particularly useful in architectural and interior photography where straight vertical lines are essential. Optically, it features a 12-element/11-group design with Super Multi-Coating (SMC), an 8-blade preset diaphragm, and a minimum aperture of f/32. The lens offers a 100° image circle and allows for ±11mm of shift in any direction, thanks to a rotating shift mechanism with detents every 30°. It focuses down to 30cm, delivers 0.13× magnification, and includes built-in filters (yellow, orange, skylight, and UV) as well as a rear gelatin filter holder. It uses a dedicated metal push-on cap, weighs 611g, and measures 89 × 93mm.
Tech Specs
| Manufacturer | Pentax |
| Series | K Series Shift |
| Model | SMC |
| Focal Length | 28mm |
| Max Aperture | f/3.5 |
| Min Aperture | f/32 |
| Format | Full-Frame |
| Image Circle | - |
| Minimum Focus | 30cm |
| Focus Rotation | ° |
| Iris Blades | 8 |
| Optical Design | 12/11 |
| Squeeze | none |
| Front Diameter | 89mm |
| Filter Thread | - |
| Focus/Zoom Rod | none |
| Native Mount | Pentax K |
| Data Protocol | none |
| Length | 93mm |
| Weight | 611g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date: 1975
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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