Appendixes 135GlossaryCompositionComposition in photography means arranging objects in a photo.Usually, abiding by the rule of thirds leads to a good composition.DCF (Design rule for Camera File system)A specification to define a file format and file system for digitalcameras created by the Japan Electronics and InformationTechnology Industries Association (JEITA).Depth of fieldThe distance between the nearest and farthest points that canbe acceptably focused in a photograph. Depth of field varies withlens aperture, focal length, and distance from the camera to thesubject. Selecting a smaller aperture, for example, will increasethe depth of field and blur the background of a composition.Digital zoomA feature that artificially increases the amount of zoom availablewith a zoom lens (Optical zoom). When using the Digital zoom,the image quality will deteriorate as the magnification increases.DPOF (Digital Print Order Format)A format for writing printing information, such as selected imagesand number of prints, on a memory card. DPOF-compatibleprinters, sometimes available at photo shops, can read theinformation from the card for convenient printing.ACB (Auto Contrast Balance)This feature automatically improves the contrast of your imageswhen the subject is backlit or when there is a high contrastbetween your subject and the background.AEB (Auto Exposure Bracket)This feature automatically captures several images at differentexposures to help you capture a properly-exposed image.AF (Auto Focus)A system that automatically focuses the camera lens on thesubject. Your camera uses the contrast to focus automatically.ApertureThe aperture controls the amount of light that reaches thecamera’s sensor.Camera shake (Blur)If the camera is moved while the shutter is open, the entire imagemay appear blurred. This occurs more often when the shutterspeed is slow. Prevent camera shake by raising the sensitivity,using the flash, or using a faster shutter speed. Alternately, use atripod, the DIS or OIS function to stabilize the camera.
