Brilliant article comparing the human eye to cameras, ISO, focal length et al: http://www.cambridgeincolour.com/tutorials/cameras-vs-human-eye.htm

Cameras vs. The Human Eye
www.cambridgeincolour.com
Why can't I just point my camera at what I'm seeing and record that? It's a seemingly simple question. It's also one of the most complicated to answer, and requires delving into not only how a camera records light, but also how and why our eyes work the way they do. Tackling such questions can revea…