Table of Contents
Pentax-M SMC 85mm f/2
Summary
The SMC Pentax-M 85mm f/2 is a compact manual-focus short telephoto prime introduced in 1977 and produced until 1984, designed for full-frame K-mount film cameras. It was part of the M-series, known for its smaller size and lighter weight compared to the earlier K-series lenses, and was positioned as a portrait-friendly alternative to the larger and faster 85mm f/1.8 and f/1.4 options. It features a 5-element - 4-group optical design, Super Multi-Coating (SMC), and a 6-blade automatic diaphragm. The lens stops down to f/22, focuses as close as 85cm, and delivers 0.13× magnification. It uses a 49mm filter thread, weighs 251g, and measures 63 × 46mm. It includes a clip-on PH-R49 hood, a plastic front cap, and was often sold with a dedicated hard case. There’s 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 | 85mm |
| Max Aperture | f/2 |
| Min Aperture | f/22 |
| Format | Full-Frame |
| Image Circle | - |
| Minimum Focus | 85cm |
| Focus Rotation | ° |
| Iris Blades | 6 |
| Optical Design | 5/4 |
| Squeeze | none |
| Front Diameter | 63mm |
| Filter Thread | 49mm |
| Focus/Zoom Rod | none |
| Native Mount | Pentax K |
| Data Protocol | none |
| Length | 46mm |
| Weight | 251g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date: 1977
Launch Price:
Design Revisions: