Olympus C7000 Zoom C-7000 Advanced Manual - Page 173

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). 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. ISO A method for indicating film speed by the International Organization for Standardization (ISO) (ex. "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 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. 10 NTSC (National Television Systems Committee) / PAL (Phase Appendix Alternating Line) Television formats. NTSC is mainly used in Japan, North America and Korea. PAL is mainly used in Europe and China. P (Program) Mode Also called Program AE mode. The camera automatically sets the best shutter speed and aperture for the shot. 173