Where the object in the image is ultra sharp and the background is blurred. You see the effect in lots of images nowadays and even seen it in some movies.
You mean “Depth of field (DOF)”?
Perhaps “bokeh” or “tiltshift” ?
Like Miseld said, this is Depth of field.That means the objects which are important for picture are in focus and everything else is out.Which result with other objects are blured.
If you are referring to Shallow depth of field, this technique has been since ages almost from the very first era of cameras I believe.
Though there are different methods to achieve this, a common technique will be reducing your DSLR’s aperture value which will increase the diameter of the aperture hardware inside the camera, thus making your lens focusing on one part and everything else falls out of focus.
Tilt Shift technique is little different – You need a tilt shift lens for that (ignoring the option of simulating the same effect in photoshop of aftereffects which can be viewed here https://vimeo.com/5246001 ). Regular lenses will have focus plane in Z-axis. Whereas, in tilt shift you can decide where that focusing plane should be. This lens if used artistically, you can make larger objects look like miniatures. Obviously, you don’t have auto focus in this lens.
Fully aware of Depth of Field. Just didnt know how they physically did it in Movies etc, no worries thanks for the info, the tilt shift is kind of what I meant.
pezflash’s help needed only when the question relates to fish eye angle