DIY 28mm Series E Lens disassembly
My 28mm Series E lens was very stiff when focusing (especially near infinity). I took it apart and journalled how in photos.

Total repair took 1.25 hours, including photographs of the process.

It was a success. The focus mechanism works like butter now and there were no adverse affects on the aperture or optical performance.

The pictures to the right each have comments attached. Start in the top left.

Flickr user photopath has posted his images of a 35mm F2 AF-D lens here
1 photo · 6,131 views