Pinhole camera
A type of camera that projects an upside-down image onto photographic film or a digital sensor by means other than a lens. The image is created by using a small hole. The time of an exposure can range anywhere from a few seconds to several hours, and it is often handled manually. It is possible to turn DSLRs into pinhole cameras by exchanging the lens for a piece of plastic that has had a hole of around 0.3 millimeters in diameter drilled into it. Alternative pinhole cameras have been constructed out of a wide variety of materials, including shoe boxes and wheelie bins.
Do you have a better definition? Share it in the comments.