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often referred to as IS and also known as Vibration reduction or VR - A feature in some lenses and camera bodies (and also binoculars and camcorders) that minimizes the effect of camera shake at slow shutter speeds, helping to prevent image blur. Optical IS, the preferred method, employs sensors that detect camera motion and compensate for its effects by moving lens elements or by moving the camera’s image sensor. Digital ISemploys software. You may come across the term Anti-shake, which is not image stabilization technology, but instead increases a camera’s ISO sensitivity to provide a faster shutter speed.

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A term commonly substituted for photograph or picture, an image is a two-dimensional reproduction of a scene.
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A comparison of the width and height of an image. An example: The aspect ratio of a 35mm frame in landscape orientation is 1:1.5 because the frame is 24mm tall by 36mm wide. (36 divided by 24 is 1.5, so a ratio of 24 to 36 is reported as 1 to 1.5, or 1:1.5, or 3:2.)
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Images edited in Adobe Photoshop, Paint Shop Pro and similar image-processing applications may be made up of a number of layers, each of which contains part of the image. When the layers are combined, a single image results.
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See Color Mode.
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Also called the imaging sensor or just the sensor. A digital camera s image sensor records the scene being photographed in a similar manner to film in a traditional camera. Unlike film, the image sensor does not store the image. It is transferred from the sensor to be stored on the digital camera s media, leaving the sensor free to record the next image being photographed.
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