=====Nikon Nikkor F 2.1cm f/4 O ===== 
{{ :lens:2.1cmf4nikkor-o.jpg?direct&400|}}
==== Summary ====
==== Tech Specs ====
| Manufacturer    |Nikon|
| Series          |Nikkor|
| Model           |F|
| Focal Length    |2.1cm|
| Max Aperture    |f/4 O|
| Min Aperture    |-|
| Format          |-|
| Image Circle    |-|
| Minimum Focus   |0.9|
| Focus Rotation  |-|
| Iris Blades     |7|
| Optical Design  |8/4|
| Squeeze         |-|
| Front Diameter  |60|
| Filter Thread   |52|
| Focus/Zoom Rod  |-|
| Native Mount    |F|
| Data Protocol   |-|
| Length          |16.5|
| Weight          |210|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin: - \\
Release Date: - \\
Launch Price: - \\
Design Revisions:\\

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

==== Notes ====
==== Media ====