Camera obscura, wooden device

MACHINE TRANSLATION (not authorised yet)

Camera obscura, also called pinhole camera, is a device which is a protoplast of modern devices (among others, a camera), which allows to learn in an experimental way the principle of its operation, its use in the past and to explain the principles and laws of optics, including, for example, the formation of an image in the human eye (an inverted and reduced image on the retina). Light rays entering through the opening of the camera create on a translucent plate an inverted image seen by the student through the opening on the other side. The image can be changed (adjustable in size) by changing the length of the device (ejecting/inserting the inner part). Dimensions: 17 x 11 x 11 cm.