vocab 1

AE(automatic exposure)- when the camera measures light and makes the adjustments necessary to create proper image density on sensitized media
AF(automatic focus)- when the camera automatically adjusts the lens elements to sharply render the subject
APERTURE- the opening in the lens that allows light to enter the camera
APERTURE PRIORITY- a type of automatic exposure in which you manually select the aperture and the camera automatically selects the shudder speed
ARTIFICIAL LIGHT- any light source that doesn't exist in nature, such as incandescent, fluorescent, and other manufactured lighting
AVAILABLE LIGHT- the amount of illumination at a given location that apples to natural and artificial light sources but not those supplied specifically for photography it is also call existing light or ambient light
BACKLIGHT- light that projects toward the camera from behind the subject
BIT/BYTE- binary digit. this is the basic unit of binary computation/eight bits
BOUNCE LIGHT- light that reflects off of another surface before illuminating the subject
BULB- a camera setting that allows the shutter to stay open as long as the shutter release is depressed
CARD READER- device that connects to your computer and enables quick and easy download of images from memory card to computer
CLOSE-UP- a general term used to describe an image created by closely focusing on a subject
COMPRESSION- method of reducing file size through removal of redundant data as with the JPEG file format
CONTRAST- the difference between two or more tones in terms of luminance, density, or darkness
CPU- Central Processing Unit. This is the "brains" of a computer or a lens
CROPPING- the process of extracting a portion of the image area. if this portion of the image is enlarged, resolution is subsequently lowered
DAYLIGHT- a white balance setting that renders accurate color when shooting in mid-day sunlight
DEPTH OF FIELD- the image space in front of and behind the plane of focus that appears acceptably sharp in the photograph
DOWNLOAD- the transfer of data from one device to another, such as from camera to computer or computer to printer
DPI- dots per inch, referring to printing resolution
EXPOSURE- when light enters the camera and reacts with the sensitized medium. the term can also refer to the amount of the light that strikes the light sensitive medium