Table of Contents
Pentax-A SMC 70-210mm f/4
Summary
The SMC Pentax-A 70–210mm f/4 is a manual-focus telephoto zoom introduced in 1984 and produced until 1988, designed for full-frame K-mount film cameras. It offers a constant f/4 aperture across its zoom range and includes a macro mode at 70mm, making it a versatile option for portraiture, nature, and close-up photography. Optically, it features a 13-element/10-group design, Super Multi-Coating (SMC), and an 8-blade automatic diaphragm. The lens focuses down to 1.2 meters in standard mode and achieves 0.25× magnification in macro mode. It uses a 58mm filter thread, weighs 680g, and measures 72 × 149mm. It includes a built-in sliding hood, a plastic clip-on cap, and a hard case (HD-190). The lens is engraved smc PENTAX-A ZOOM 1:4 70~210mm and includes an “A” setting on the aperture ring, enabling full automation on compatible Pentax bodies.
Tech Specs
| Manufacturer | Pentax |
| Series | A Series Zoom |
| Model | SMC |
| Focal Length | 70-210mm |
| Max Aperture | f/4 |
| Min Aperture | f/32 |
| Format | Full-Frame |
| Image Circle | - |
| Minimum Focus | 120cm |
| Focus Rotation | ° |
| Iris Blades | 8 |
| Optical Design | 13/10 |
| Squeeze | none |
| Front Diameter | 72mm |
| Filter Thread | 58mm |
| Focus/Zoom Rod | none |
| Native Mount | Pentax K |
| Data Protocol | none |
| Length | 149mm |
| Weight | 680g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date: 1984
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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