lens repair.

Sat down today with a 35-135mm Canon lens that had some loose parts on the inside, including a lens element that was nearly sideways inside its housing. When shook it was obvious that the lens had a few screws loose, but I was able to disassemble and reassemble the lens with the help of the diagrams I found on this site:

http://www.micro-tools.net/pdf/Canon/

These exploded view diagrams helped identify the correct placement of the various screws that were loose inside the lens. There are few if any businesses that repair lenses locally, and shipping and repair can cost as much as a new lens. The inner mechanisms of the lens were nice to see in naked action, and the repair was more or less successful. The only failure was the loss or lack of an individual screw, but with two out of three screws in place the lens seems to be functioning. The engineer in me wants to learn more of the dying craft of camera repair. If anyone knows where used and broken lenses can be obtained please, please let me know.