===== Pentax-M SMC 35-70mm f/2.8 ===== 
{{ :lens:pentax-m_smc_35-70mm_f2.8.png?300|}}
==== Summary ====
The SMC Pentax-AF 35-70mm f/2.8 is a historically significant lens introduced in 1981 as Pentax’s first autofocus lens, designed exclusively for the Pentax ME-F—the world’s first TTL autofocus SLR. It features a constant f/2.8 aperture, a rarity at the time, and was built with an in-lens AF motor powered by four AAA batteries. On any camera other than the ME-F, it functions as a manual-focus lens, behaving much like an M-series zoom with no electronic aperture control. Optically, it employs a 7-element, 7-group design with Super Multi-Coating (SMC) and an 8-blade automatic diaphragm, stopping down to f/22. It focuses as close as 1.2 meters, uses a 58mm filter thread, and weighs 580g, measuring 73 × 77mm. The lens lacks internal focusing, quick-shift, or an “A” setting on the aperture ring, so it requires stop-down metering on modern bodies. It was typically bundled with a RH-60 slip-on hood and a dedicated hard case.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |M Series Zoom|
| Model           |SMC|
| Focal Length    |35-70mm|
| Max Aperture    |f/2.8|
| Min Aperture    |f/22|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |120cm|
| Focus Rotation  |°|
| Iris Blades     |8|
| Optical Design  |7/7|
| Squeeze         |none|
| Front Diameter  |73mm|
| Filter Thread   |58mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |77mm|
| Weight          |580g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1981 \\
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>\\
</nodisp>
==== 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 ====