Samsung HMX-W200TN User Manual (user Manual) (ver.1.0) (English) - Page 90
GLOSSARY, F. No F-Number
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Additional information GLOSSARY AF (Auto Focus) A system that automatically focuses the product lens on the subject. Your product uses the contrast to focus automatically. Aperture The aperture controls the amount of light that reaches the product's sensor. Composition Composition in photography means arranging objects in a photo. Usually, abiding by the rule of thirds leads to a good composition. Complementary Metal-Oxide-Semiconductor (CMOS) CMOS is an image sensor producing images approaching the quality of CCD (charge coupled device) sensors. It consumes less power, meaning a longer battery life on your product. Digital zoom A feature that artificially increases the amount of zoom available with zoom lens (Optical zoom). When using the Digital zoom, the image quality will deteriorate as the magnification increases. Effective Pixel Count Unlike the total pixel count, this is the actual number of pixels used to capture an image. Exposure The amount of light allowed to reach the product's sensor. Exposure is controlled by a combination of the shutter speed, the aperture value, and ISO sensitivity. Focal length The distance from the middle of the lens to its focal point (in millimeters). Longer focal lengths result in narrower angles of view and the subject is magnified. Shorter focal lengths result in wider angles of view. 84 F. No (F-Number) The f-number defines the brightness of a lens. Smaller number lenses generally have brighter images. The f-number is directly proportional to the focal length and inversely proportional to the lens diameter. Ú F.No=focal length/diameter of lens aperture MPEG-4 AVC/H.264 MPEG-4 AVC/H.264 defines the latest video coding format standardized by the ISOIEC and the ITU-T in 2003. Compared with the conventional MPEG-2 format, MPEG-4 AVC/H.264 has more than twice the efficiency. Your product employs MPEG-4 AVC/H.264 to encode high definition videos. Product shake (Blur) If the product is moved while the shutter is open, the entire image may appear blurred. This occurs more often when the shutter speed is slow. Prevent product shake by raising the sensitivity, using a faster shutter speed. Alternately, use a tripod, the DIS or OIS function to stabilize the product. Quality An expression of the rate of compression used in a digital image. Higher quality images have a lower rate of compression, which usually results in a larger file size. Resolution The number of pixels present in a digital image. High resolution images contain more pixels and typically show more detail than low resolution images. Shutter speed Shutter speed refers to the amount of time it takes to open and close the shutter, and it is an important factor in the brightness of a photo, as it controls the amount of light which pass through the aperture before it reaches the image sensor. A fast shutter speed allows less time to let light in and the photo becomes darker and more easily freezes subjects in motion.