Kodak 6B8773 Depth of field, EV Exposure value, Exposure Compensation, Exposure modes, Number

Depth of field	The zone of sharpest focus in front of, behind, and around the subject.
EV (Exposure value)	A numeric value that expresses the amount of light for a given exposure. It
	depends on the brightness of the photographic subject and the sensitivity of
	the imager. If a photographic subject is bright, the EV will be large, and if
	the subject is dark, the EV will be small. If twice the amount of light reaches
	the imager’s surface, the difference in exposure value will be +1, and if half
	the amount of light reaches the imager’s surface, the exposure value
	changes by -1.
Exposure	The amount of light reaching the image's surface. The exposure is
	controlled by the combination of aperture and shutter speed.
Exposure Compensation	This function lets you intentionally overexpose or underexpose a picture.
Exposure modes	Program Auto: Camera sets both shutter speed and aperture for correct
	exposure.
	Shutter Priority Auto: You select the shutter speed and the camera sets
	the appropriate aperture for correct exposure.
	Aperture Priority Auto: You select the aperture and the camera sets
	appropriate shutter speed for correct exposure.
	Manual: You select both shutter speed and aperture, according to
	indications on the exposure meter
f-number	The numbers on the lens aperture ring that indicate the relative size of the
	lens aperture opening.
Histogram	The image histogram shows the range and distribution of tonal values for an
	image. The tick marks at the bottom of the histogram represent
	photographic stops relative to the factory-determined 18% gray level. The
	range of stops is from +3 to -7. The double bar tick mark indicates the
	exposure value associated with 18% gray. Tick marks to the right of the
	double mark indicate one-stop increments brighter than 18% gray, and tick
	marks to the left indicate one-stop increments darker than 18% gray.
ISO	ISO is the international standard for representing film sensitivity. The higher
	the number, the greater the sensitivity, and vice versa. For example, ISO 200
	is twice as sensitive as ISO 100, and half that of ISO 400. When you change
	the ISO setting on your camera, you adjust the sensitivity of the imager
	equivalent to the corresponding film sensitivity.
JPEG	Joint Photographic Experts Group has established a standard method for
	compressing and decompressing digitized images. If the rate of
	compression is high, the file size will be small but picture quality will be
	decreased.

Glossary-2 April 28, 2004