===== Pentax-A SMC 28mm f/2.8 ===== 
{{ :lens:pentax-a_smc_28mm_f2.8.png?300|}}
==== Summary ====
The SMC Pentax-A 28mm f/2.8 is a compact, manual-focus wide-angle prime introduced in 1984 and produced until 1988, designed for full-frame K-mount film cameras. It shares the same optical formula as the second version of the Pentax-M 28/2.8 but adds an “A” setting on the aperture ring, enabling full program and shutter-priority automation on compatible Pentax bodies. Optically, it features a 7-element/7-group design, Super Multi-Coating (SMC), and a 5-blade automatic diaphragm. It delivers a 75° diagonal field of view on full-frame (or ~55° on APS-C), focuses down to 30cm, and offers 0.13× magnification. The lens uses a 49mm filter thread, weighs just 170g, and measures 63 × 36.5mm. It was originally paired with the PH-S49 hood and HA-90B hard case, though these were often sold separately.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |A Series Prime|
| Model           |SMC|
| Focal Length    |28mm|
| Max Aperture    |f/2.8|
| 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          |36.5mm|
| Weight          |170g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1984 \\
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 ====