ART 11380 Lecture Notes - Lecture 3: View Camera, Macro Photography, Collodion Process
Document Summary
In general, all cameras work in a similar way. A photograph is taken by letting light fall on a light-sensitive medium, which then records the image onto that medium. How light or dark a photograph depends on how much light was allowed to fall on the light-sensitive medium. A camera is a light-tight box that contains a light-sensitive material or device and a way of letting in a desired amount of light at particular times to create an image on the light-sensitive material. The optical element of a camera consists of a lens. In other words, a lens can simply be a curved piece of glass. This glass takes the light bouncing off an item and redirects the light so that it forms an image of the item. It is able to do this because light changes speed as it moves from one material to another. The glass of the lens slows the light down from its speed in air.
