30 km/h! It doesn't move very far, but it does so in milliseconds.

Jeffrey Friedl show us an amazing mini-movie of the shutter of a Nikon D3 (the photos are by Marianne Oelund).

It's amazing so accurate the shutter mechanism is. 16 milliseconds from it opens to it starts closing. Click-click-click. The D3 it's rated for three hundred thousand exposures.

With so many things that are now electronic, poorly built or both it's refreshing to get reminded how durable and precise they are still building SLR cameras.