fake stars defocused
These are fake stars. I was shooting images in my basement with a LED light source behind a sheet of aluminum foil. The foil has very small (pin) holes evenly spaced across about a 6" square in a 1/4 inch grid (Tip: I used a sheet of graph paper over the foil to poke the holes).
Setup: This image was shot with my T2i through a WO Z73 at a distance of approx. 30 feet. Image settings were 1 second exposure and ISO 400 in a mostly dark room.