Before starting this guide be sure to assess that the lenses fault matches these symptoms. If your symptoms are different, this guide may still help with disassembly for repairing other faults.

Symptoms

When focussing the camera may shut off with 'Error 00' message.

In manual focus mode the focus can not be adjusted, but the iFn ring does still work (e.g. for changing aperture).

Focus only works at some zoom levels.

At a zoom level where focus does work, the focus elements can be seen to move through the front element.