Watching The Exposure Cycle In Slow Mo Reveals Some Impressive Engineering
Watching a camera shutter go in slow motion is both educating and amazing. The exposure cycle is well known:
- Mirror goes up
- front curtain moves down, exposing the CCD
- back curtain slides down blocking the CCD from further exposure
- front curtain moves back into upwards "ready" position
- mirror goes back down.
Actually there is a 1.5 step where the back curtain moves up, getting ready to go down later, but this step is hidden from us as it happens behind the (still closed) front curtain.
This cycle can go as fast as 1/8000 of a second on some of the more professional camera bodies.
I thought it would be fun to watch different cameras go at the shutter sequence in slow mo. Note that some of the clips were not taken with a pro camera but rather with the $450 Nikon V1. Personally I was surprised at the backlash the mirror goes through on the rerun step.