===== Pentax SMC 400mm f/5.6 ===== 
{{ :lens:pentax_smc_400mm_f5.6.png?400|}}
==== Summary ====
This extreme-telephoto lens also comes in a slightly lighter M version with automatic diaphragm.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |K Series Prime|
| Model           |SMC|
| Focal Length    |400mm|
| Max Aperture    |f/5.6|
| Min Aperture    |f/45|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |800cm|
| Focus Rotation  |°|
| Iris Blades     |10|
| Optical Design  |5/5|
| Squeeze         |none|
| Front Diameter  |85mm|
| Filter Thread   |77mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |277mm|
| Weight          |1285g|
| 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 ====