Here’s a rather remarkable animation showing the assembly of an EOS 10D DSLR and a 24-85 lens. The authors are Matthew Farrell, Michelle Pang and Michael Tom of the University of California and was a final project in the Berkeley Engineering 128 Advanced Engineering Design Graphics course, Spring 2008. The software used was Pro/ENGINEER Wildfire 3.0 SolidWorks and 2005 Autodesk Viz 2008. Running time is about 10 minutes. source