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”, | |
|
| |
| 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 | |
| ||
| 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 | ||
| ||
|
| |
| 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 | ||
| ||
|
|
4