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Appendix
Glossary of terms
Aperture
The adjustable lens opening which controls the amount of light that enters the
camera. The larger the aperture, the shorter the depth of field and the fuzzier the
background. The smaller the aperture, the greater the depth of field and the sharper
the background. Larger aperture values indicate smaller apertures, and smaller
aperture values indicate larger apertures.
CCD (Charge-Coupled Device)
This converts light passing through the lens into electrical signals. On this camera,
light is picked up and converted into RGB signals to build a single image.
Contrast Detection Method
This is used to measure the distance to the subject. The camera determines if the
image is focused by the level of contrast in the subject.
DCF (Design Rule for Camera File System)
A standard for image files by the Japan Electronics and Information Technology
Industries Association (JEITA).
DPOF (Digital Print Order Format)
This is for saving desired print settings on digital cameras. By entering which images
to print and the number of copies of each, the user can easily have the desired
images printed by a printer or print lab that supports the DPOF format.
Eclipsing (Vignetting)
This refers to when an object obscures part of the field of view so that the whole
subject is not photographed. Vignetting also refers to when the image seen through
the viewfinder does not exactly match the image shot through the objective lens, so
the photographed image includes objects not seen through the viewfinder. In
addition, vignetting can occur when an incorrect lens hood is used, causing
shadowing to appear in the corners of the image.
ESP (Electro-Selective Pattern) Light Metering/Digital ESP Light
Metering
This determines the exposure by metering and calculating the light levels in the
center and other areas of the image separately.
EV (Exposure Value)
A system for measuring exposure. EV0 is when the aperture is at F1 and the shutter
speed is 1 second. The EV then increases by 1 each time the aperture increases by
one F stop or the shutter speed increases by one increment. EV can also be used to
indicate brightness and ISO.
Exposure
The amount of light used to capture an image. The exposure is determined by the
time the shutter is open (shutter speed) and the amount of light that passes through
the lens (aperture).
Image Size
The size of an image expressed by the number of pixels that make up the image. For
instance, a picture taken with an image size of 640 × 480 fills the computer screen
when the monitor setting is 640 × 480. However, if the monitor setting is
1,024 × 768, the picture only takes up part of the screen.
