===== Pentax-M SMC 75-150mm f/4 ===== 
{{ :lens:pentax-m_smc_75-150mm_f4.png?200|}}
==== Summary ====
The SMC Pentax-M 75–150mm f/4 is a compact, manual-focus telephoto zoom introduced in 1980 and produced until 1985, designed for full-frame K-mount film cameras. It was part of Pentax’s M-series—known for compactness and solid build—and aimed to offer the convenience of multiple focal lengths in a single, high-quality package. Optically, it features a 12-element/9-group design, Super Multi-Coating (SMC), and a 6-blade automatic diaphragm. The lens maintains a constant f/4 aperture throughout the zoom range, stopping down to f/32, and focuses down to 1.2 meters, delivering a maximum magnification of ~0.12×. It uses a 49mm filter thread, weighs 465g, and measures 64 × 111mm. It includes a built-in sliding hood, a plastic clip-on cap, and a dedicated hard case. The zoom and focus are controlled via a one-touch push-pull ring, and the lens lacks an “A” setting, so it’s best used in manual or aperture-priority modes on modern digital bodies.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |M Series Zoom|
| Model           |SMC|
| Focal Length    |75-150mm|
| Max Aperture    |f/4|
| Min Aperture    |f/32|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |120cm|
| Focus Rotation  |°|
| Iris Blades     |6|
| Optical Design  |12/9|
| Squeeze         |none|
| Front Diameter  |64mm|
| Filter Thread   |49mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |111mm|
| Weight          |465g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1980 \\
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 ====