Olympus E-1 Reference Manual

Also see for E-1 - Digital Camera SLR: Specifications Instructions Instructions Basic Manual Quick start guide

Contents

175Miscellaneous12Glossary of termsA (Aperture Priority) ModeYou set the aperture yourself and the camera automatically varies the shutter speed so that thepicture is taken with the correct exposure.AE (Automatic Exposure)The camera’s built-in exposure meter automatically sets the exposure. The 3 AE modes availableon this camera are P mode, in which the camera selects both the aperture and shutter speed, Amode, in which the user selects the aperture and the camera sets the shutter speed, and S mode,in which the user selects the shutter speed and the camera sets the aperture.In M mode, the user selects both the aperture and the shutter speed.ApertureThe adjustable lens opening which controls the amount of light that enters the camera. The largerthe aperture, the shorter the depth of field and the fuzzier the background. The smaller theaperture, the greater the depth of field and the sharper the background. Aperture is measured inf/stops. Larger aperture values indicate smaller apertures, and smaller aperture values indicatelarger apertures.CCD (Charge-Coupled Device)This converts light passing through the lens into electrical signals. On this camera, light is pickedup and converted into RGB signals to build a single image.Center weighted averaging meteringA light metering mode or technique that uses an average of the center and periphery of the imagearea but is biased toward the information at the center of the image area. This method is bestused when the brightness of the center and periphery of the image area does not vary greatly.See also digital ESP metering and spot metering.Color spaceA model that describes colors using more than three coordinates. Color spaces such as sRGB,Adobe RGB are occasionally used for encoding/reproducing colors.Color temperatureThe spectral balance of different white light sources is rated numerically by color temperature — aconcept of theoretical physics that, with incandescent lighting, corresponds roughly to theabsolute lamp filament temperature, expressed on the Kelvin (K) temperature scale. The higherthe color temperature, the richer the light in bluish tones and the poorer in reddish; the lower thecolor temperature, the richer the light in reddish tones and the poorer in bluish. You mayencounter difficulties with color reproduction when shooting indoors under fluorescent lighting, orwhere sunlight and fluorescent lighting are both present. Your camera is provided with a whitebalance adjustment feature that you can use to compensate for the odd effects of combinations ofcolor you may occasionally see in your pictures.Compression rateCompression is a method of reducing file size by abbreviating some contents of data, andcompression rate denotes the amount of compression. The actual effect of the selectedcompression rate could vary with the content of the image. The numbers for the compression rateselected with this camera provide only a general scale for reference and are not precisemeasurements.