Tilt Shift lenses focus on a single part of the photo and shift (blur) the surrounding area to create an optical illusion of miniaturized scenery. Real tilt shift lenses are quite expensive, but a similar effect can be achieved by using Photoshop after you take the photo.
Tilt shift photographs create an optical illusion that makes scenes appear as if they are actually miniature model (That's why it been called Miniature Photography too). The outer edges are blurred which tricks the eye into perceiving everything in the unblurred parts as miniature There is a Flickr group dedicated to this technique(and I'm very sure Mr Azwan Abidin is of them!;p). It’s a fun post processing trick – and it’s quite easy to reproduce.
Before
After
