Quote - Interesting. Are we trying to emulate the camera lens, or human vision? Would they be the same?

No. For one thing, cameras usually have depth-of-field effects, and human vision tends not to. If I take a photo of a person standing in front of a tall building in the distance, the person will be in focus and the building won't be. Because the human eye can move about in a scene, and re-focus, if I am looking at the person he will be in focus, and if my attention shifts to the building it will be in focus.