This video documents various shutter speeds from INSIDE of a DSLR camera, a Canon 7D to be exact.
The Slo Mo Guys Over on their YouTube Channel posted this video. It’s really cool to see the effect and really gives you a clearer insight into the various effects shutter speed can have on an image.
They take the lens off of a Canon 7D and film the shutter of the camera in slow motion at different shutter speeds. First you get to see them one by one. Then they put them all side by side. You get to see the shutter get thinner and thinner as the speed increases.