High Speed Video of Canon DSLR Shutter
The action begins at the 60 second mark.
Here’s a great video showing the mirror and shutter mechanism in a Canon DSLR. The action begins 60 seconds in.
Keep in mind that the entire real-time duration of the mirror swinging up, the shutter coming down, the exposure, the shutter coming back up and the mirror swinging down is .213 seconds.
Great find, Tom!