Olympus IR 300 IR-300 Advanced Manual (English) - Page 159

Glossary of terms 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 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). Appendix Images 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. 12 Noise reduction When shooting in dark places, shutter speeds become slower as there is less light focused on the CCD. During long exposures, signals are generated by parts of the CCD where no light is focused and are recorded on the picture as noise. When noise reduction works, the camera automatically reduces the noise to produce clearer images. 159