=====Leica Summicron-R Ver II 50mm f/2 ===== 
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==== Summary ====
==== Tech Specs ====
| Manufacturer    |Leica|
| Series          |R|
| Model           |Summicron Ver II|
| Focal Length    |50mm|
| Max Aperture    |f/2|
| Min Aperture    |f/16|
| Format          |-|
| Image Circle    |-|
| Minimum Focus   |0.5m / 19.7 in.|
| Focus Rotation  |-|
| Iris Blades     |6|
| Optical Design  |6/4|
| Squeeze         |none|
| Front Diameter  |-|
| Filter Thread   |E55|
| Focus/Zoom Rod  |-|
| Native Mount    |R|
| Data Protocol   |-|
| Length          |41mm|
| Weight          |290g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |Manual|
| Iris Drive      |Manual|
| Zoom Drive      |n/a|
==== History ====
Country of Origin: - \\
Release Date: 1976-2009 \\
Launch Price: - \\
Design Revisions:\\

==== Service ====
<nodisp 8>
Service Manual: [[staff:servicedb:Leica-R50mmf2V2|Disassembly/Re-assembly]] \\
Series Filter Thread Guide: [[staff:servicedb:FilterThreads|Series Filter Threads Explained]]\\
\\
Full CLA: **5-6 hrs.**\\
<wrap note>This focal length has 2 versions of the serial # ring. \\
version 1: serial # ring threads on. loosen with acetone and unscrew. \\
version 2: **the tricky one** serial ring is glued on. Use a little acetone and a razor or thin spudger to pry it up.</wrap>\\
Re-collimate: **2 hrs**\\
<wrap note>remove FER and sunshade/FR to expose lock ring. loosen, check condition of teflon washer underneath, replace teflon as needed, rotate front group. Secure LR with LOTS of glue. let set fully before rotating focus. LR can cause front group to shift. always double check collimation.</wrap>\\
Coupling: **$50** \\
<wrap note>see [[staff:servicedb:Leica-RCouplingGuide|Leica-R Non-destructive Iris Coupling Guide]] for non-destructive and reversible procedure.\\
Once you remove the iris components, you can access the wire spring. If needed, the optics can drop out for better access but that requires more dis-assembly and time. </wrap>\\
</nodisp>

==== Cine-Mod ====
<nodisp 8>
Focus Ring O.D.: 2.523"\\
Zoom Ring O.D.: N/A\\
Iris Ring O.D.: 2.593"\\
De-c
lick Y/N: Yes\\
Iris Coupling: Yes, **$50**\\
<wrap note>from what i see, we should be able to snip the wire once the mount and iris ring components are removed without further dis-assembly. </wrap> \\
<wrap note>see [[staff:servicedb:Leica-RCouplingGuide|Leica-R Non-destructive Iris Coupling Guide]] for non-destructive and reversible procedure.</wrap> \\
Additional Notes: \\
</nodisp>
==== Notes ====
==== Media ====
https://lens-db.com/system/leica-r/full-list/\\
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