===== Pentax SMC 24mm f/2.8 =====
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==== Summary ====
The SMC Pentax 24mm f/2.8 is a manual-focus wide-angle prime introduced in 1977 and produced until 1984, designed for full-frame K-mount film cameras. It features a 9-element/8-group optical design, Super Multi-Coating (SMC), and a 5-blade automatic diaphragm, offering an 84° diagonal field of view on full-frame (or ~62° on APS-C). With a minimum focus distance of 25cm, it delivers 0.12× magnification, making it suitable for general-purpose wide-angle work including landscape, street, and environmental photography. Physically, the lens is compact and well-balanced, weighing 194g and measuring 63 × 41.5mm. It uses a 52mm filter thread, includes a dedicated PH-S52 hood, and lacks an “A” setting on the aperture ring—so it’s best used in manual or aperture-priority modes on modern digital bodies. The lens was succeeded by the SMC Pentax-A 24mm f/2.8, which shares the same optical formula but adds auto-aperture support.
==== Tech Specs ====
| Manufacturer |Pentax|
| Series |K 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 |41.5mm|
| Weight |194g|
| Body Telescope |-|
| Body Material |-|
| Focus Drive |-|
| Iris Drive |-|
| Zoom Drive |-|
==== History ====
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Release Date: 1977 \\
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==== Service ====
Service Manual: (Insert link to manual here) \\
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Full CLA: **TBD hrs.**\\
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==== Cine-Mod ====
Focus Ring O.D.: -\\
Zoom Ring O.D.: -\\
Iris Ring O.D.: -\\
De-click Y/N: -\\
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==== Notes ====
==== Media ====