===== Pentax-M SMC 28mm f/2.8 Ver 1 ===== 
{{ :lens:pentax-m_smc_28mm_f2.8_ver_1.png?250|}}
==== Summary ====
The SMC Pentax-M 28mm f/2.8 is a compact manual-focus wide-angle prime lens for Pentax K-mount 35mm and full-frame digital SLRs, produced in two versions between 1977 and 1984. Both versions share a 7-element/7-group optical design, a 5-blade automatic diaphragm, and Pentax’s Super Multi-Coating (SMC) for improved contrast and flare resistance. The second version adopted the optical formula of the later A-series lens and dropped the silver decorative ring, but both deliver similar performance. With a 75° diagonal field of view on full-frame and a minimum focus distance of 0.3m, it’s well-suited for landscapes, street photography, and general-purpose shooting. The lens uses a 49mm filter thread, weighs around 156–170g, and measures just 63 × 31mm, making it a great choice for lightweight kits. While it lacks an “A” setting on the aperture ring, it’s fully compatible with manual and aperture-priority modes on Pentax DSLRs. Optically, it performs best from f/5.6 to f/11, with decent center sharpness and moderate contrast. Wide open, it’s a bit soft with some corner softness and lower contrast, but stopping down improves clarity significantly. Its rendering has a slightly vintage character, and while the bokeh isn’t its strong suit, it’s a solid performer for its size and price.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |M Series Prime|
| Model           |SMC|
| Focal Length    |28mm|
| Max Aperture    |f/2.8 Ver 1|
| Min Aperture    |f/22|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |30cm|
| Focus Rotation  |°|
| Iris Blades     |5|
| Optical Design  |7/7|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |49mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |31mm|
| Weight          |156g|
| 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: \\
</nodisp>
==== Notes ====
==== Media ====