===== Pentax-M SMC 28mm f/3.5 ===== 
{{ :lens:pentax-m_smc_28mm_f3.5.png?300|}}
==== Summary ====
The SMC Pentax-M 28mm f/3.5 is a compact, manual-focus wide-angle prime lens for Pentax K-mount 35mm and full-frame digital SLRs, produced from 1977 to 1985. It features a 6-element/6-group optical design, a 5-blade automatic diaphragm, and Pentax’s Super Multi-Coating (SMC) for improved contrast and flare resistance. As the slower of the two M-series 28mm variants, it prioritizes sharpness and portability over speed. With a 75° diagonal field of view on full-frame and a minimum focus distance of 0.3m, it’s well-suited for landscapes, architecture, and general-purpose shooting. The lens uses a 49mm filter thread, weighs just 180g, and measures 63 × 31.5mm, making it one of the smallest wide-angle primes in the Pentax lineup. It lacks an “A” setting on the aperture ring but is fully compatible with manual and aperture-priority modes on Pentax DSLRs.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |M Series Prime|
| Model           |SMC|
| Focal Length    |28mm|
| Max Aperture    |f/3.5|
| Min Aperture    |f/22|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |30cm|
| Focus Rotation  |°|
| Iris Blades     |5|
| Optical Design  |6/6|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |49mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |31.5mm|
| Weight          |180g|
| 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 ====