Camera Obscura in my attic

William putting first foil on window

image on paper from lens-assisted obscura

William wants to begin a new science project so he began his experimentation with the conversion of our attic into a camera obscura. The attic is a good choice due to it having one door at the bottom of the steps (light doesn't come up from there very easily) and two fairly small windows. He covered them with foil and cut a hole to observe the effects. We also picked up some lenses and tested their effect (a +1.0 lens makes the light focus about 24 inches from the lens and a +1.5 focuses at 18 inches. We'll probably go pick up a 2.0 for the creation of a box obscura.