===== Pentax-M SMC 150mm f/3.5 ===== 
{{ :lens:pentax-m_smc_150mm_f3.5.png?200|}}
==== Summary ====
The SMC Pentax-M 150mm f/3.5 is a compact manual-focus telephoto prime introduced in 1977 and produced until 1986, designed for full-frame K-mount film cameras. It was part of the second-generation “M” series lenses, offering a slightly faster aperture and more compact build than its K-series predecessor, while maintaining Pentax’s hallmark of optical clarity and mechanical precision. Optically, it features a 5-element - 5-group design with Super Multi-Coating (SMC) and a 6-blade automatic diaphragm. The lens stops down to f/32, focuses as close as 1.8 meters, and delivers a 0.1× magnification ratio. It uses a 49mm filter thread, weighs just 290g, and measures 63 × 75mm. It includes a built-in sliding hood, a manual aperture ring (no “A” setting), and was typically sold with a dedicated hard case. There’s no internal focusing or weather sealing, but the lens is fully compatible with all Pentax K-mount bodies, including digital cameras with manual exposure support.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |M Series Prime|
| Model           |SMC|
| Focal Length    |150mm|
| Max Aperture    |f/3.5|
| Min Aperture    |f/32|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |180cm|
| Focus Rotation  |°|
| Iris Blades     |6|
| Optical Design  |5/5|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |49mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |75mm|
| Weight          |290g|
| 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 ====