Just got the Canon prime lens EF 50 mm f1.8 II, aka the "nifty fifty", and did this little test at full f1.8 to see how shallow the depth of field would be. As you can see it's insane at this price point (a hundred bucks) but also extremely hard to focus properly all the time. The best way is to set focus and then move the camera slightly in and out etc.

Equipment:

Canon EOS 550D
Canon EF 50mm f1.8 II prime lens
Fader ND MK II filter
Premiere Pro CS6
Magic Bullet Looks II
Several Apple and Plum products

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