Friday, September 3, 2010

vocab words


Aperture:
 an opening, usually circular, that limits the amount of light that can enter the camera

shutter:
a  device for opening and closing the aperture of a camera lens to expose film 

exposure:
 the act of presenting a photosensitive surface to rays of light.

depth of field:
the range of distances along the axis of  a camera lens, through which an object will produce a  distinct image.

F-stop:
the setting of an adjustable lens  as indicated by an f number.

focal length:
the distance from a focal point of a lens or mirror to the corresponding principal plane. 
Astigmatism: lines in some directions are focused less sharply than lines in other directions.

Coma: the image of a point source of light cannot be brought into focus, but has instead a comet shape

Air: A  large area of white space in a layout.

Bleed : Describes a photographic print that extends to the edges of the paper  page and has no visible border ☺☻

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