BokehShape

For 52mm lens
Open the widest possible the aperture to maximize the effect of the BokehShape

I personnaly use it on a 50mm F/2.2 Canon Lens

should render somehting like this : http://thumbs.dreamstime.com/z/blur-image-kuala-lumpur-city-star-bokeh-shape-light-trail-has-been-defined-as-way-lens-renders-out-focus-points-43096357.jpg