Being an engineer and a enthusiast photographer I have been amazed by this excellent video!!
It is an outstanding video showing the parts and all the inside of a Canon 10D and an EF 24-85mm lens. It’s amazing the number of parts that go into something that basically a box with a hole in it. Even though this is an older model, it still shows how amazing the design of a DSLR really is.
This video has been found at Photo Geek blog here and has been produced by some brilliant engineering students, namely Matthew Farrell, Michelle Pang, Michael Tom, from UC Berkeley, Engineering 128, Spring 2008.