Table of Contents
Pentax-M SMC 35mm f/1.4
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Summary
The SMC Pentax-M 35mm f/1.4 is one of the rarest and most enigmatic lenses in Pentax history—a prototype-turned-unicorn that was briefly manufactured in 1980 but never officially released to the public. Believed to exist in only a handful of copies (possibly fewer than five), it was designed for full-frame K-mount film cameras and remains virtually unseen outside of collector circles. Optically, it features a 10-element/8-group design, Super Multi-Coating (SMC), and a 6-blade automatic diaphragm. It offers a 63° diagonal field of view on full-frame (or ~45° on APS-C), focuses down to 40cm, and delivers 0.16× magnification. The lens uses a 58mm filter thread, weighs 420g, and measures 67.5 × 64.5mm. It includes a dedicated rectangular clip-on hood, hard case, and plastic cap, and is engraved smc PENTAX-M 1:1.4 35mm. There is no “A” setting on the aperture ring, so it’s best used in manual or aperture-priority modes.
Tech Specs
| Manufacturer | Pentax |
| Series | M Series Prime |
| Model | SMC |
| Focal Length | 35mm |
| Max Aperture | f/1.4 |
| Min Aperture | f/22 |
| Format | Full-Frame |
| Image Circle | - |
| Minimum Focus | 40cm |
| Focus Rotation | ° |
| Iris Blades | - |
| Optical Design | 10/8 |
| Squeeze | none |
| Front Diameter | 67.5mm |
| Filter Thread | 58mm |
| Focus/Zoom Rod | none |
| Native Mount | Pentax K |
| Data Protocol | none |
| Length | 64.5mm |
| Weight | 420g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date: 1980
Launch Price:
Design Revisions: