Aperture: A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.
Shutter Speed: The unit of measurement which determines how long shutter remains open as the picture is taken.
ISO: Measures the sensitivity of the image sensor.
Depth of Field: The distance between the nearest and the furthest objects that give an image judged to be in focus in a camera.
Motion Blur: The apparent streaking of rapidly moving objects in a still image or a sequence of images such as a movie or animation.
Noise and Light Sensitivity: Random (not present in the object imaged) variation of brightness or color information in images.
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