===== Pentax SMC 55mm f/1.8 ===== 
{{ :lens:pentax_smc_55mm_f1.8.png?250|}}
==== Summary ====
The SMC Pentax 55mm f/1.8 is a manual-focus standard prime lens introduced in 1975 as part of the original K-series lineup—Pentax’s first bayonet-mount lenses following the M42 era. It features a 6-element/5-group optical design, a 6-blade automatic diaphragm, and Super Multi-Coating (SMC) for enhanced contrast and flare resistance. With a fast f/1.8 aperture, it excels in low-light shooting and offers pleasing background blur, especially for portraits and general-purpose photography. The lens focuses down to 0.45m, delivers a 0.17× magnification, and uses a 52mm filter thread. It weighs 221g, measures 63 × 39mm, and lacks an “A” setting on the aperture ring—making it fully compatible with manual and aperture-priority modes on Pentax DSLRs.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |K Series Prime|
| Model           |SMC|
| Focal Length    |55mm|
| Max Aperture    |f/1.8|
| Min Aperture    |f/22|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |45cm|
| Focus Rotation  |°|
| Iris Blades     |6|
| Optical Design  |6/5|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |52mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |39mm|
| Weight          |221g|
| 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 ====