=====Cooke Mini S4/i 21mm T2.8 =====
{{ :lens:1451485268_1199491.jpg?400|}}
==== Summary ====
The Mini S4/i primes (T2.8 to T22 aperture) incorporate everything that today's filmmakers require: smaller, lightweight lenses that offer the same resolution, optical quality and reliability as the S4/i lenses.
==== Tech Specs ====
| Manufacturer    |Cooke|
| Series          |Mini S4/i|
| Model           |-|
| Focal Length    |21mm|
| Max Aperture    |T2.8|
| Min Aperture    |T22|
| Format          |Super 35|
| Image Circle    |33.54mm|
| Minimum Focus   |10 in.|
| Focus Rotation  |300|
| Iris Blades     |8|
| Optical Design  |-|
| Squeeze         |none|
| Front Diameter  |87mm|
| Filter Thread   |none|
| Focus/Zoom Rod  |none|
| Native Mount    |PL|
| Data Protocol   |Cooke/i|
| Length          |5.4 in.|
| Weight          |1543 g|
| Body Telescope  |none|
| Body Material   |Aluminum|
| Focus Drive     |Manual|
| Iris Drive      |Manual|
| Zoom Drive      |n/a|
==== History ====
Country of Origin: UK \\
Release Date:  \\
Launch Price:  \\
Design Revisions:\\

==== Service ====
<nodisp 8>
Known Issues: \\
<wrap note>1. optical core is loose in housing. noticed when tipping lens up and down and optics shift front to back. Collimation will change on the projector. If so, cam follower assembly is either loose or damaged. Tightening or replacement should fix the issue.</wrap>\\
Service Manual: [[staff:servicedb:s4imini|Disassembly/Re-assembly]] \\
\\
Full CLA: **5 hrs.**\\
<wrap note>Enter relevant notes here</wrap>\\
Tighten/Secure or Replace cam follower assembly: **3 hrs**\\
<wrap note> skips cleaning the optics but includes re-lubing focus and iris.\\
does not include accessing iris blades which are inside the optical core.</wrap>\\
Loose optical core: replace cam follower assembly **3 hrs.+ part**\\
<wrap note>QUOTE ENTIRE ASSEMBLY, NOT PARTIAL DUE TO FIT ISSUES	</wrap>\\
Electronic issues: **+ 1 hr.**\\
<wrap note>DO NOT TEST ON RED CAMERAS!                          
electronics are easily accessed. add time for swapping parts and investigation process</wrap>\\			
Re-calibrate data: **1 hr.**\\				

</nodisp>
>
==== Notes ====
==== Media ====
{{ :lens:cooke_mini-s4i-s35_specification_030623.pdf |}}