VR: Vibration Reduction, a technology used in such photographic accessories as a VR lens.
USB: Universal Serial Bus. This interface standard allows outlying accessories to be pligged and allows outlying accessories to be plugged and unplugged from the computer while it is turned on.
TTL: Through The Lens.
Tripod: A three-legged stand that stabalizes the camera and eliminates camera shake caused by body movement or vibration.
Thumbnail: A miniaturized representation of an image file.
Strobe: Abbreviation for stroboscopic. An electronic light source that produces a series of evenly spaced bursts of light.
Stop: To stop.
SLR: A camera with mirror that reflects the image entering the lens through a pentaprism or pentamirror onto the view finder screen. When you take the picture, the mirror reflexes out of the way, the focal plane shutter opens, and the image is recorded.
Shutter: The apparatus that controls the amount of time during which light is allowed to reach the sensitized medium.
Resolution: The amount of data available for an image as applied to image size. It is expressed in pixels or megapixles, or sometimes as lines per inch on a monitor or dots per inch on a printed screen.
Raw: An image file format that has little or no internal processing applied by the camera. It contains 12-bit color information, a wider range of data than 8-bit formats such as JPEG.
RAM: Random Access Memory which is a computer's memory capacity, directly accessible from the central processing unit.
Pixel: Derived from picture element. A pixel is the base component of a digital image. Every individual pixel can have a distinct color and tone.
Perspective: The effect of the distance between the camera and image elements upon the perceived size of objects in an image. It is also an expression of this three-dimensional relationship in two dimensions.
Pan: Mocing the camera to follow a moving subject.
Noise: The digital equivalent of grain . It is often caused by a number of different factors, such as high ISO setting, heat, sensor design, etc. Though usually undesirable, it may be added for creative effect using an image-processing program.
Macro Lens: a lens designed to be at top sharpness over a flat field when focused at close distances and reproduction ratios up to 1:1
Manual Exposure: a camera operating mode that requires user to determine and set both the aperture and shutter speed, This is the opposite of automatic exposure.
Megabyte: just over one million bytes
Megapixel: A million pixels
Memory: The storage capacity of a hard drive or other recording media
Memory Card: typical recording medium of digital cameras. Memory rcards can be used to store still images, moving images, or sound, as well as related file data. There are several different types , e.g., CompactFlash, Smartmedia, xD, Memory Stick, etc. Individual card capacity is limited by available storage capacity as well as by the size of the recorded data, such as image resolution
Menu: An on-screen listing of user options.
Mode: Specified operating conditions of the camera or software program
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