Saturation . The degree to which a color is undiluted by white light. If a color is 100 percent saturated, it contains no white light. If a color has no saturation, it is a shade of grey.
Scanner. An optical device that converts images such as photographs, into digital form so that they can be stored and manipulated on your PC. Different methods of illumination transmit light through red, green and blue filters and digitize the image into a stream of pixels.
Scene Modes. Many digital cameras now have an exposure mode called scene where the user selects the best pre-programmed scene to suit the current shooting conditions. The camera will automatically change many settings to capture the best possible image. E.g. Sports, landscape, portrait etc.
SD. (Secure Digital). A flash memory card used in digital cameras and MP3 players. It is identical in size and shape to the MultiMedia Card (MMC). The difference being that SD cards were designed to hold protected (copyrighted) data like songs. Not all cameras that use SD cards can use MMC cards so be sure to read your owner manual before buying additional cards.
Self Timer. Preset time delay (e.g. 2, 5, 3, 5 or 10 seconds) before the shutter fires automatically. This allows the photographer be in the picture without using a long cable release or remote control. It is also great for taking macro or night shots as by not touching the camera, you eliminate the chances of camera shake. Is also good to use the "mirror lock up" function if you have it.
Sepia. The (brownish) mono toned effect seen in images from the original 19th and early 20th Century cameras. This is now a feature often found as a special image effect on some digital cameras and/or editing software.
Shutter. The physical device that opens and closes to let light from the scene strike the image sensor. Digital cameras use both electronic and mechanical shutters.
Shutter Lag. The time between pressing the shutter and actually capturing the image. This is due to the camera having to calculate the exposure, set the white balance and focus the lens. Is worse with smaller digital cameras whereas the better DSLR's now have little or no shutter lag, like the better film SLR's.
Shutter Priority AE. This is where the user chooses a shutter speed and the aperture is automatically determined by lighting conditions. Shutter speed priority is used to control motion capture. A fast shutter speed stops fast action, a slow shutter speed blurs a fast moving subject. It is good to use shutter priority for sports or wildlife photography.
Skylight Filter. This is an Ultra Violet absorbing filter that helps overcome the abundance of blue in outdoor photographs. Not really necessary in digital photography as the camera's white balance system adjusts for the color temperature of the scene. You can also use them to protect the camera's lens from scratching, fingerprints or dirt.
Slow Sync. A flash mode in some digital cameras that opens the shutter for a longer than normal period and fires the flash just before it closes. Is used for illuminating a foreground subject, but allowing a darker background to also be well exposed. Good for night time shots of buildings with people in the foreground.
SLR. (Single Lens Reflex). This means the camera has a viewfinder that sees through the lens (TTL) by way of a 45°-angled mirror that flips up when the shutter fires and allows the light to strike the image sensor (or film). Basically, what you see is what you get.
SmartMedia. (SSFDC). A flash memory card that consists of a thin piece of plastic with laminated memory on the surface and uses a gold contact strip to connect to the camera. SmartMedia cards are available in various sizes.
Spot Metering. The camera's auto exposure system is focused on a very small area in the centre of the viewfinder to adjust the overall exposure value just for that area.
Stitching. Combining a series of images to form a larger image or a panoramic photo. Requires special post editing software.
SuperCCD. Fujifilm's image sensor used in their line of digital cameras.
SVGA. (Super VGA). This refers to an image resolution size of 800 x 600 pixels.
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