Light Metering - Olympus C-770 - Ultra Zoom 4MP Digital Camera Reference Manual

Glossary of terms
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 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).
Flash Bracket
A mount used to attach an external flash to the camera. Shadows on the
subject can be changed by detaching the flash. The flash is used in
combination with the flash cable.
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.
JPEG (Joint Photographic Experts Group)
A compression format for still images. Photographs (images) shot using this
11 camera are recorded onto the card in JPEG format when the Record mode is
set to SHQ, HQ, SQ1 or SQ2. By downloading these images to a personal
computer, users can edit them using graphics application software or view the
images using an Internet web browser.
M (Manual) Mode
The user sets both the aperture and shutter speed.
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