[mherdeg]

(I realize that there are a few details that you can use to tell these apart, but,) Who gets to register the copyright on the image?

[howenterprisey]

I'd imagine there are two images so there are two copyrights.

[thih9]

There would be two copyright holders, one for each image.

Even if they left the lens caps on and both images were black on black, there would be two distinguishable images with e.g.: different exif data, sensor noise, etc.

[throwaway290]

The scene is not subject to copyright (naturally occurring).

If we pretend that camera sensor captures are exactly the same, then I guess it does not belong to a single photographer in this case. But usually no one cares about sensor data, people care about "deliverables", like JPEGs or printed versions, and they will not be the same because everything after sensor capture would be different for each photographer.

[tantalor]

What do you mean by "scene"? Like, the state of the world at the time of the photograph? Why would anyone think that was "subject to copyright"?