Olympus C-2040 Zoom C-2040 Zoom Reference Manual - Page 217

Glossary of terms EV Exposure Value) An exposure measurement system in which the exposure for an aperture of F1 and a shutter speed of 1 second is taken as EV0. The EV value 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 for which 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. ISO A method for indicating film speed laid down by the International Organization for Standardization (ISO) (e.g. "ISO 100"). Higher ISO values indicate greater sensitivity to light so that images can be exposed even in low-light conditions. JPEG Joint Photographic Experts Group) A compression format for color still images. Photographs (images) shot using this camera are recorded onto the SmartMedia card in JPEG format when the Record mode is set to SHQ, HQ or SQ. 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 A shooting mode in which the user sets both the aperture and the shutter speed. P (Program) Mode Also called Program AE mode. In this mode, the camera automatically sets the optimal shutter speed and aperture setting for the shot. Pixels A pixels the smallest unit (dot) used to make up an image. Large size clear printed images require large number of pixels. Ring Flash A flash unit that uses a circular xenon fluorescent tube as the light source. S (Shutter Priority) Mode Also called Shutter Priority AE mode. In this mode, the user selects the shutter speed and the camera automatically varies the aperture according to the shutter speed setting so that the picture is taken with the optimum exposure. Synchro Terminals Terminals on an external flash unit that are used for connecting to the camera. TFT (Thin-Film Transister) Color Monitor A color Monitor constructed using thinfilm technology. TIFF Tagged Image File Format) A format used for saving black and white and color image data. TIFF image files can be handled by software programs for scanners and graphics applications. TTL (Through-The-Lens) System An exposure adjustment mechanism in which a light receptor built into the camera directly measures the light passing through the lens. TTL-AUTO An external flash unit function. This is a control method in which the light emitted by the flash is received and measured by the light receptor in the camera as it passes through the lens. A flash intensity control signal is then generated using that light and sent to the flash unit. Miscellaneous 10 217