=====ZEISS Jena 20mm f/2.8 ===== 
{{ :lens:f5a5ce4ab3ecd65161682f95431f969c.jpg?400|}}
==== Summary ====
==== Tech Specs ====
| Manufacturer    |ZEISS|
| Series          |Jena|
| Model           |Flektogon|
| Focal Length    |20mm|
| Max Aperture    |f/2.8|
| Min Aperture    |f/22|
| Format          |-|
| Image Circle    |-|
| Minimum Focus   |-|
| Focus Rotation  |-|
| Iris Blades     |-|
| Optical Design  |-|
| Squeeze         |n/a|
| Front Diameter  |-|
| Filter Thread   |-|
| Focus/Zoom Rod  |n/a|
| Native Mount    |M42|
| Data Protocol   |none|
| Length          |-|
| Weight          |-|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |Manual|
| Iris Drive      |Manual|
| Zoom Drive      |n/a|
==== History ====
Country of Origin:  \\
Release Date:  \\
Launch Price:  \\
Design Revisions:\\

==== Service ====
<nodisp 8>
Known Issues: \\
<wrap note>1. keys are plastic. Do not over torque focus. </wrap>\\
Service Notes: [[staff:servicedb:zeissJena|Disassembly/Re-assembly]] \\
\\
**No service offered**\\
Full CLA: **N/A**\\
<wrap note>Enter relevant notes here</wrap>\\
</nodisp>

==== Cine-Mod ====
<nodisp 8>
Focus Ring O.D.: \\
Zoom Ring O.D.: \\
Iris Ring O.D.: \\
De-click Y/N: Yes (simple ball and spring)\\
Additional Notes: \\
</nodisp>
==== Notes ====
==== Media ====