, the students developed of how changing the length of the tube affects the magnification of the object. It is important to note to students that these pinhole "lenses" don't really have a focal length because they are not actually focusing the light, but this provides a way for us to compare the effect to real glass lenses that do focus the light. The pinhole camera can be used to demonstrate a range of optical phenomena. The use of digital cameras makes this traditional demonstration accessible for today's technologi cally engaged students, and gives them the opportunity to use technology in a productive way to explore the physics of optics.