===== Pentax-A SMC 24mm f/2.8 ===== 
{{ :lens:pentax-a_smc_24mm_f2.8.png?250|}}
==== Summary ====
The SMC Pentax-A 24mm f/2.8 is a compact, manual-focus wide-angle prime introduced in 1984 and produced until 1989, designed for full-frame K-mount film cameras. It was the final evolution of Pentax’s 24mm f/2.8 lineage, succeeding the K-series version and retaining the same 9-element - 8-group optical formula, but adding the all-important “A” setting on the aperture ring for full Program and Shutter-Priority automation on compatible bodies. Physically, it’s a lightweight and travel-friendly lens, weighing just 205g and measuring 63 × 42mm. It uses a 52mm filter thread, stops down to f/22, and focuses as close as 25cm, delivering a 0.12× magnification. The lens lacks internal focusing or weather sealing, but includes a manual aperture ring, a PH-S52 clip-on hood, and was typically sold with the HA-90 hard case. The 5-blade diaphragm is a bit unusual for a prime of this class, and contributes to its distinctive bokeh.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |A Series Prime|
| Model           |SMC|
| Focal Length    |24mm|
| Max Aperture    |f/2.8|
| Min Aperture    |f/22|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |25cm|
| Focus Rotation  |°|
| Iris Blades     |5|
| Optical Design  |9/8|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |52mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |42mm|
| Weight          |205g|
| 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 ====