===== Pentax-A SMC 35-70mm f/4 ===== 
{{ :lens:pentax-a_smc_35-70mm_f4.png?300|}}
==== Summary ====
The SMC Pentax-A 35–70mm f/4 is a manual-focus standard zoom lens for Pentax K-mount 35 mm and full-frame digital SLRs, produced from 1984 to 1985. It features a 7-element/7-group optical design, a 6-blade automatic diaphragm, and Pentax’s Super Multi-Coating (SMC) for improved contrast and flare resistance. Its standout feature is a constant f/4 aperture throughout the zoom range—unusual for a compact zoom of its era. The lens focuses down to 0.25m, offering a surprisingly strong 0.37× magnification, making it handy for close-up work. It uses a 58mm filter thread, weighs 330g, and measures 65 × 80mm. The zoom and focus rings are separate, allowing for precise manual control, and the lens includes an “A” setting on the aperture ring, enabling full Program, Shutter-priority, and Aperture-priority modes on compatible Pentax film and digital bodies.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |A Series Zoom|
| Model           |SMC|
| Focal Length    |35-70mm|
| Max Aperture    |f/4|
| Min Aperture    |f/22|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |25cm|
| Focus Rotation  |°|
| Iris Blades     |6|
| Optical Design  |7/7|
| Squeeze         |none|
| Front Diameter  |65mm|
| Filter Thread   |58mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |80mm|
| Weight          |330g|
| 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.**\\
<wrap note></wrap>\\
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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 ====