I use a very wide-angle lens for most of my interior architectural photographs. Yet, that sometimes isn't enough to tell the story. That's when I pull out my "fisheye" lens, which can capture objects over a span of up to 180 degrees (measured diagonally across the frame). In this instance, the architect wanted to tell the story about how a section of the second floor had been removed to open this foyer back up to its original height, thus allowing light from an upper window to filter into both floors. Yes, a lot of distortion is introduced in the process, but this image does, indeed, show all of the necessary elements, allowing the viewer to understand how everything relates spatially.