Here's a comparison that illustrates the behavior of foreground blur (shot with a DSLR): http://i.imgur.com/986Iv2K.jpg http://i.imgur.com/986Iv2K.jpg You'll n

Here's a comparison that illustrates the behavior of foreground blur (shot with a DSLR): http://i.imgur.com/986Iv2K.jpg http://i.imgur.com/986Iv2K.jpg You'll notice that on the bottom image, even though the foreground leaves are out of focus, the blur does not apply to the background - details in the background are still sharp, even if partially occluded by the foreground blur.