Ultra-Fast Lenses

Very large aperture lenses, those with an f/number of f/1.2 or less, don't just let a lot of light in. They also have vanishingly small depth-of-focus. That makes them hard to focus, but often results in beautifully smooth out-of-focus portions of the scene (i.e., very pleasing bokeh). This challenge is for photos shot using a taking aperture marked as f/1.2 or faster. Note that not all ultra-fast lenses are expensive; used special-purpose lenses as fast as f/0.75 can be adapted for macro photography on most DSLRs and EVILs: http://www.instructables.com/id/Using-Ultra-Fast-Lenses-on-DSLR-Cameras/