- Lens - Wikipedia
Lenses are made from materials such as glass or plastic and are ground, polished, or molded to the required shape A lens can focus light to form an image, unlike a prism, which refracts light without focusing
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- Lenses: Camera Lenses, Photography Lenses | B H Photo
At a very basic level, lenses allow you to focus light onto a sensor or film and produce a clear and sharp image of the scene in front of you Lenses also let you adjust exposure, modify the plane of focus, and different focal lengths can be used to change your field of view
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- Lens | Meaning, Principles, Manufacture, Facts | Britannica
Single lenses are used in eyeglasses, contact lenses, pocket magnifiers, projection condensers, signal lights, viewfinders, and on simple box cameras More often a number of lenses made of different materials are combined together as a compound lens in a tube to permit the correction of aberrations
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