What kind of diaphragm did their cameras have?
I managed to dodge this bullet on Valentine's Day, but it finally caught up with me yesterday.
Anyway, storytelling and acting aside, what kind of weird diaphragm did their cameras have? Whenever there were out of focus lights, they were rectangular.
http://i.imgur.com/PYAYhhr.jpg
It always used to be that the better the lens, the more blades the iris has. This looks like the iris must have had either 4 straight blades, or 2 right angle blades. Is this some technology I'm unaware of, or did they just have really, really cheap lenses?