Jupiter 12 35 mm f/ 2.8 Lens Servicehandbuch

 
Here it Goes: Jupiter-3 Adjustments and Disassembly.  
This is the 6th J-3 that I've worked on. It's not the one that I stayed up with until Midnight trying to 
get the Helical back together. THAT one was off by 12 ft at 15ft when I received it. The Helical had 
been mis-threaded. Took me awhile. 
 

J-3, front and back. Some lenses do not have a retaining ring over the rear element.