Originally Posted by Rather Dashing
So, anybody want to explain to a graphics layman what this fancy depth of field stuff is?
Basically a real world camera lens has to be focused at specific distance so that it creates a clear picture of the thing you are filming or taking a photo of. Objects at other distances appear blurred because the light isn't converging at the focal point. This is true of our eyes as well.
Games have only recently started to emulate this effect, It is most noticable in the newer FPS games when you use iron sights to aim. While it's nothing overly important, it's a nice touch that adds to the cinematic feel