HP t500 Photography Terms and Definitions, USB, JPEG, Terms, (AWB), Exif/JPEG, ISO Speed, Definitions, White Balance, Format (DPOF), Exposure Value, Auto Focus (AF)

Photography Terms and Definitions

Terms	Definitions
	Auto focus refers to a camera lens’ ability to adjust its configuration in
	order to focus properly on a subject regardless of whether it is near or
Auto Focus (AF)	far from the camera. Auto focus lenses generally provide vastly superior
	image quality than do their fixed focus cousins since they do not have to
	rely on their depth of field. Also known as: “AF”, “auto-focus”.
	The adjustment of electronic still picture color channel gains or image
White Balance	processing so that radiation with relative spectral power distribution
	equal to that of the scene illumination source is rendered as a visual
	neutral.
	With auto white balance, the camera attempts to determine the
Auto White Balance	color temperature of the light and automatically adjust for that color
(AWB)	temperature. Many people just leave the camera set to auto white
	balance all the time.
	A standardized ASCII file created in a digital camera and stored on
Digital Print Order	removable media along with the image files that indicate how many
Format (DPOF)	copies of which images should be printed. It also allows index prints,
	cropping, and text overlays to be specified.
	A compressed file format for digital cameras in which the images
Exif/JPEG	are compressed using the baseline JPEG standard, described in ISO
	12234-2, and metadata and thumbnail images are stored using TIFF
	tags within an application segment at the beginning of the JPEG file.
JPEG	Joint Photographic Experts Group. An image compression method
	defined in ISO/IEC 10918-1.
	A numerical value that is inversely proportional to the exposure provided
Exposure Value	to an image sensor to obtain an image. Images obtained from a camera
	using a range of exposure index values will normally provide a range of
	image quality levels.
	A numerical value calculated from the exposure provided at the focal
	plane of an electronic camera to produce specified camera output signal
ISO Speed	characteristics using the methods described in the referenced standard.
	The ISO speed should correlate with the highest exposure index value
	that provides peak image quality for normal scenes.
USB	Universal serial bus, a digital interface for connecting up to 64 devices
	in a tiered-star topology. See http://www.usb.org.

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