i have always heard that 35mm (on SLR) is roughly the human eye perspective, but that isnt really the case .... I was reading some photo book - cant remember which one now - which talks about this at some length. Essentially it said that we have an almost 180 deg field of vision (try looking forward, with your fingers about a foot infront of your eyes, then mover them slowly following a semicircle movement towards your ears, you'll be amazed at how far they go before they dissappear out of sight) and extremely shallow DOF with incredible macro and telephoto focusing abilities - all changing and processing at split seconds. No lens will ever be able to replicate that.