===== Pentax SMC 28-50mm f/3.5-4.5 ===== 
{{ :lens:pentax_smc_28-50mm_f3.5-4.5.png?300|}}
==== Summary ====
This is the only non-mirror zoom lens of the K series to have varying aperture.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |K Series Zoom|
| Model           |SMC|
| Focal Length    |28-50mm|
| Max Aperture    |f/3.5-4.5|
| Min Aperture    |f/22-32|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |55cm|
| Focus Rotation  |°|
| Iris Blades     |6|
| Optical Design  |10/10|
| Squeeze         |none|
| Front Diameter  |65mm|
| Filter Thread   |52mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |52mm|
| Weight          |315g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1975 \\
Launch Price:  \\
Design Revisions:  \\

==== Service ====
<nodisp 8>
Service Manual: (Insert link to manual here) \\
\\
Full CLA: **TBD hrs.**\\
<wrap note></wrap>\\
</nodisp>
==== 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 ====