Black's Photo Glossary
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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CAPTURE
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To take a picture. To press the shutter release. Synonym of shoot, snap, etc.
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CATCHLIGHT
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Reflection of a light source in a subject’s eyes. Portrait often place lights off-camera to create catchlights in the 10 or 2 o’clock position.
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CCD
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Abbreviation of CHARGED COUPLED DEVICE. A digital sensor that converts light into electrical current. When used in digital cameras, it is the electronic equivalent of film. See also CMOS, SENSOR.
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CD-ROM
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A compact disc that contains pre-recorded data.
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CD-R/CD-RW
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Respectively CD-Recordable and CD-Rewritable. A CD-R can store data or music but can only be recorded upon once. A CD-RW functions in the same way, but it can be erased and new data written onto it. CD-R/CD-RW discs can hold up to 800 MB of data or 74 minutes of music.
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CLOSE-UP
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A picture taken less than 2 or 3 feet away from the subject, and sometimes from a distance of only inches. See also MACRO.
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CMOS
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Complementary Metal Oxide Semi-Conductor. An analog sensor that converts light into digital information When used in digital cameras, it is the electronic equivalent of film. See also CCD, SENSOR.
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CMYK
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An abbreviation of the four colours used in traditional process printing and by inkjet printers: Cyan, Magenta, Yellow and blacK. (The K is used to avoid confusion with blue). Combining these four colours in varying degrees reproduces the entire visible spectrum. Some inkjet printers use a variation of CMYK which includes regular cyan, magenta, yellow and black inks, as well as special photo-versions of cyan, magenta, and yellow.
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COLOUR BALANCE
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The accuracy with which a photograph reproduces colours. 2) The adjustment of colours to ensure improved accuracy.
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COMPACT CAMERA
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Often called point-and-shoot, a non-SLR camera designed for simple operation and having many automated functions.
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COMPACT FLASH (CF)
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A type of removable memory card used by digital cameras and other portable electronic devices. Compact flash cards come in a variety of sizes, starting at 32MB and going as high as 8GB. Other popular formats include SD, xD, Smart Media and Memory Sticks. See also MEMORY CARD.
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COMPRESSION
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Reduction of the size of digital image file to save storage space. There are two types of compression: lossless and lossy. Lossless compression reduces file size without throwing away any data. Lossy compression throws away non-critical or redundant data to achieve even greater savings in size. RAW and TIFF are lossless compression schemes. JPEG is a lossy compression scheme.
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CONTACT SHEET
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A printed sheet of reduced sized images used to verify/catalog digital photographs or rolls of film.
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CONTINUOUS SHUTTER MODE
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See BURST MODE.
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CONTRAST
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The difference between the lightest and the darkest areas of an image. The greater the difference, the higher the contrast.
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CROPPING
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Trimming away the unwanted parts of an image to reframe the wanted portion.
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