===== Pentax-M SMC 120mm f/2.8 ===== 
{{ :lens:pentax-m_smc_120mm_f2.8.png?250|}}
==== Summary ====
The SMC Pentax-M 120mm f/2.8 is a compact manual-focus telephoto prime introduced in 1977 as part of the second-generation M-series for the Pentax K-mount. It replaced the earlier K-series 120mm f/2.8, offering a lighter, more compact design while retaining the same focal length and optical formula. With its slightly unusual focal length, it sits between the more common 100mm and 135mm lenses, making it a distinctive choice for portraiture, travel, and compressed landscape scenes. Optically, the lens features a 5-element, 5-group design with Super Multi-Coating (SMC) and an 8-blade automatic diaphragm, stopping down to f/32. It focuses as close as 1.2 meters, delivers a 0.13× magnification ratio, and uses a 49mm filter thread. The lens weighs just 270g, measures 63 × 63mm, and includes a built-in slide-out hood—a hallmark of M-series telephotos. There’s no internal focusing or “A” setting on the aperture ring, so metering on modern digital bodies requires stop-down operation.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |M Series Prime|
| Model           |SMC|
| Focal Length    |120mm|
| Max Aperture    |f/2.8|
| Min Aperture    |f/32|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |120cm|
| Focus Rotation  |°|
| Iris Blades     |8|
| Optical Design  |5/5|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |49mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |63mm|
| Weight          |270g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1977 \\
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: \\
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==== Notes ====
==== Media ====