===== Pentax SMC 105mm f/2.8 ===== 
{{ :lens:pentax_smc_105mm_f2.8.png?250|}}
==== Summary ====
The SMC Pentax 105mm f/2.8 is a rare short telephoto prime introduced in 1975 and produced until 1977, designed for full-frame K-mount film cameras. It’s the only 105mm lens Pentax ever made in the K bayonet mount, making it a unique entry in the K-series lineup—positioned between the more common 100mm and 135mm focal lengths. It features a 5-element - 4-group optical design, Super Multi-Coating (SMC), and a 6-blade automatic diaphragm. The lens stops down to f/32, focuses as close as 1.2 meters, and delivers 0.11× magnification. It uses a 52mm filter thread, weighs 294g, and measures 63 × 63mm. It includes a PH-R52 clip-on hood, plastic cap, and was often sold with a dedicated hard case. There’s no “A” setting on the aperture ring, so it’s best used in manual or aperture-priority modes.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |K Series Prime|
| Model           |SMC|
| Focal Length    |105mm|
| Max Aperture    |f/2.8|
| Min Aperture    |f/32|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |120cm|
| Focus Rotation  |°|
| Iris Blades     |6|
| Optical Design  |5/4|
| Squeeze         |none|
| Front Diameter  |63mm|
| Filter Thread   |52mm|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |63mm|
| Weight          |294g|
| 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 ====