==== Pentax SMC 135mm f/2.5 ===== 
{{ :lens:pentax_smc_135mm_f2.5.png?200|}}
==== Summary ====
The SMC Pentax 135mm f/2.5 is a fast, manual-focus telephoto prime lens for Pentax K-mount 35mm and full-frame digital SLRs, produced from 1975 to 1985. It features a 6-element/6-group optical design, an 8-blade automatic diaphragm, and Pentax’s Super Multi-Coating (SMC) for excellent contrast, color fidelity, and flare resistance. With a bright f/2.5 aperture and a minimum focus distance of 1.5m, it’s ideal for portraits, nature, and compressed-perspective scenes with shallow depth-of-field. The lens uses a 58mm filter thread, weighs 500g, and measures 68 × 86mm in a robust all-metal barrel. It delivers excellent center sharpness and rich color rendering, especially from f/4 to f/8, with a smooth, natural bokeh that makes it a favorite for portraiture. While it lacks a built-in hood, it was originally supplied with a clip-on PH-R58 hood and hard case.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |K Series Prime|
| Model           |SMC|
| Focal Length    |135mm|
| Max Aperture    |f/2.5|
| Min Aperture    |f/32|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |150cm|
| Focus Rotation  |°|
| Iris Blades     |8|
| Optical Design  |6/6|
| Squeeze         |none|
| Front Diameter  |68mm|
| Filter Thread   |58mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |86mm|
| Weight          |500g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1975 \\
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 ====
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Focus Ring O.D.: -\\
Zoom Ring O.D.: -\\
Iris Ring O.D.: -\\
De-click Y/N: -\\
Additional Notes: \\
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==== Notes ====
==== Media ====