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Chapter 10
Glossary of terms (Cont.)
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 automatically 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.
Effective Pixel Resolution
The number of pixels used in the
CCD to create the image.
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 settings.
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).
Gross Pixel Resolution
The total number of pixels in a
CCD. Not all pixels are used to
create the image.
ISO
A method for indicating film speed
by the International Organization
for Standardization (ISO) (e.g.
"ISO100"). Higher ISO values
indicate greater sensitivity to light,
so images can be exposed even in
low-light conditions.
