Photography Terms and Definitions
| Terms | Definitions | |
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| Auto focus refers to a cameras’ ability to adjust its configuration in order | |
| to focus properly on a subject regardless of whether it is near or far from | |
| Auto Focus (AF) | 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”, | |
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| 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. | |
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| Auto White Balance | An algorithm in the camera that compensates for different kinds of lighting | |
and adjusts for the best image quality. Many people just leave the camera | ||
| (AWB) | ||
set to auto white balance all of the time. | ||
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| 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 copies | |
| Format (DPOF) | of which images should be printed. It also allows index prints, cropping, | |
| and text overlays to be specified. | |
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| A compressed file format for digital cameras in which the images are | |
| Exif/JPEG | compressed using the baseline JPEG standard, described in ISO | |
and metadata and thumbnail images are stored using TIFF tags within an | ||
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| application segment at the beginning of the JPEG file. | |
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| JPEG | Joint Photographic Experts Group. An image compression method | |
defined in ISO/IEC | ||
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| 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 | ||
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| image quality levels. | |
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| 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. | |
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| USB | Universal serial bus, a digital interface for connecting up to 64 devices in | |
a | ||
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