Table of Contents
Pentax-A SMC 200mm f/4
Summary
The SMC Pentax‑A 200mm f/4 is a compact manual‑focus telephoto prime introduced in the 1980s as part of Pentax’s A‑series lineup for the K‑mount system. Designed as the successor to the M‑series version, it added the “A” aperture setting for full program and shutter‑priority automation on compatible bodies, making it more convenient for both film and later digital shooters. With its moderate telephoto reach and relatively lightweight construction, the lens offered an accessible option for photographers needing extra reach for portraits, nature, and general telephoto work without the bulk of faster 200mm lenses. Its simple optical formula and classic Pentax ergonomics made it a practical and affordable choice in the A‑series catalog. Optically, the lens employs a 6‑element, 6‑group design with SMC (Super Multi‑Coating) to reduce flare and improve contrast. It features an 8‑blade automatic diaphragm, stopping down to f/32, and focuses as close as 1.9 meters, delivering a maximum magnification of 0.14x. The lens accepts 52mm filters, weighs only 405g, and includes a traditional aperture ring with the crucial “A” position for body‑controlled exposure modes. There is no internal focusing.
Tech Specs
| Manufacturer | Pentax |
| Series | A Series Prime |
| Model | SMC |
| Focal Length | 200mm |
| Max Aperture | f/4 |
| Min Aperture | f/32 |
| Format | Full-Frame |
| Image Circle | - |
| Minimum Focus | 190cm |
| Focus Rotation | ° |
| Iris Blades | 8 |
| Optical Design | 6/6 |
| Squeeze | none |
| Front Diameter | 64mm |
| Filter Thread | 52mm |
| Focus/Zoom Rod | none |
| Native Mount | Pentax K |
| Data Protocol | none |
| Length | 111mm |
| Weight | 405g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date: 1984
Launch Price:
Design Revisions: