===== Pentax-A SMC 70-210mm f/4 ===== 
{{ :lens:pentax-a_smc_70-210mm_f4.png?200|}}
==== 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) \\
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Full CLA: **TBD hrs.**\\
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==== Cine-Mod ====
<nodisp 8>
Focus Ring O.D.: -\\
Zoom Ring O.D.: -\\
Iris Ring O.D.: -\\
De-click Y/N: -\\
Additional Notes: \\
</nodisp>
==== Notes ====
==== Media ====