Small and innocent looking, they used an electronic shutter and 10ns exposures to capture a nuke`.

 

These are photographs of the first few milliseconds of nuclear explosions. They lead scientists to several new discoveries as to how nuclear bombs worked. But how do you capture the first millisecond of a nuclear bomb? With several rapatronic cameras, a Kerr cell, and a little physics.

 

There is a lack of explanation.

What is this? How large? Is this a side view? An aerial view? What are those "legs" in one of the picture?

I don't know the scale, but the bomb is on a tower, and the "legs" are the guy wires for the tower vaporizing.

There was more info in the links at the end of the io9 article, but some of them seem broken now.