GLOSSARY

analog - generating or operating as a continuously variable "wave" of directly measurable quantities;

camera obscura - means "dark room" in Latin. Created in the mid-Sixteenth century, this precursor of cameras we know today created projected light pictures within a dark room by permitting no light to enter the space except for that passing through a small hole. The light rays entering through the tiny hole would land upon the opposite wall or surface to create full-color images that are upside-down and backwards, showing the scene outside the room. diagrams

circles of confusion - out-of-focus highlights; these are circular because the lens is circular

convection currents - currents in air and water that are induced by temperature differential

curator - a person in charge of organizing an exhibition

depth of field - the area between the nearest and farthest points from the camera that are acceptably sharp in the focused image

digital - binary storage of information as 1s and 0s

fisheye lens - a lens with an extremely wide angle of view, as much as 180 degrees, and considerable barrel distortion (straight lines at the edges of a scene appear to curve around the center of the image)

image - another term used to describe the picture in a photograph

installation - a work of art, usually an environment, which is constructed within an exhibition space

lens - a transparent device, found in the eye and in most cameras, used to form an image by focusing rays of light

optics - the science of light

out-of-focus - refers to an image created when the rays of light passing through a lens fall upon a plane in front of or beyond the point at which they converge to form a sharp image. Out-of-focus images appear blurred or fuzzy.

photograph - an image made on a surface by the action of radiant energy, especially light

point of view - the position from which something is seen or considered; for instance, head-on, from overhead, from ground level

projection - a magnified image created by light thrown upon a semireflective surface

scale - a proportion between two sets of dimensions, as between that of a photograph and the actual size of the object seen in the photograph

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