=====Leica R Super-Angulon 21mm f/4 ===== 
{{ :lens:21mmf4super-angulon-r.jpg?direct&400|}}
==== Summary ====
==== Tech Specs ====
| Manufacturer    |Leica|
| Series          |R|
| Model           |Super-Angulon|
| Focal Length    |21mm|
| Max Aperture    |f/4|
| Min Aperture    |f/22|
| Format          |-|
| Image Circle    |-|
| Minimum Focus   |20cm / 7.87in.|
| Focus Rotation  |-|
| Iris Blades     |4|
| Optical Design  |10/8|
| Squeeze         |none|
| Front Diameter  |-|
| Filter Thread   |Series 8.5|
| Focus/Zoom Rod  |-|
| Native Mount    |R|
| Data Protocol   |-|
| Length          |43.5mm|
| Weight          |420g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |Manual|
| Iris Drive      |Manual|
| Zoom Drive      |n/a|
==== History ====
Country of Origin: - \\
Release Date: 1978-1994 \\
Launch Price: - \\
Design Revisions:\\

==== Service ====
<nodisp 8>
Service Manual: [[staff:servicedb:Leica-R|Disassembly/Re-assembly]] \\
\\
Full CLA: **4-5 hrs.**\\
<wrap note>Enter relevant notes here</wrap>\\
modify rear baffle for speedbooster: **2-3 hrs.**\\
					
</nodisp>

==== Cine-Mod ====
<nodisp 8>
Focus Ring O.D.: -\\
Zoom Ring O.D.: -\\
Iris Ring O.D.: -\\
De-click Y/N: Yes\\
Iris Coupling: Yes, **$50**\\
<wrap note> can be accessed from rear under mount</wrap>\\
Additional Notes: \\
</nodisp>
==== Notes ====
==== Media ====