This is an idea cjdavis had mentioned some weeks back: Using the laser cutter to cut out custom filters that mount to a camera’s lens and create custom bokeh shapes. I finally tried it yesterday.
We had on hand a large pile of little card-stock rectangles salvaged from the garbage; we thought they were blanks for playing cards and we had no use for them. However, I discovered, our laser cutter can cut them very quickly, and they are large enough that a 52mm circle fits inside (which matters because 52mm is the filter size of all my lenses).
…and it fit perfectly inside my 18-55mm lens (perhaps a little too perfectly, because it was sort of a pain to remove…). Here are a couple test images I shot:
I could have centered it better, and I still should calibrate the size a bit, but I’m impressed with how it turned out for something that took all of 5 seconds to cut.
Full Flickr album is here. I can have SVGs or DXFs up if anyone asks, but really, these patterns are dead-simple to put together by hand in Inkscape or something similar.