camera lens
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A camera lens is a piece of glass or assembly of glass pieces that works with a camera to focus light and create images of objects. It matters because without a lens, a camera cannot form clear, usable pictures.
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Different kinds of camera lenses, including wide angle, telephoto and speciality A camera lens, photographic lens or photographic objective is an optical lens or assembly of lenses (compound lens) used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.
There is no major difference in principle between a lens used for a still camera, a video camera, a telescope, a microscope, or other apparatus, but the details of design and construction are different. A lens might be permanently fixed to a camera, or it might be interchangeable with lenses of different focal lengths, apertures, and other properties.