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  2. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    in which is the focal length of the objective lens in a refractor or of the primary mirror in a reflector, and is the focal length of the eyepiece.. Magnifying glass. The maximum angular magnification (compared to the naked eye) of a magnifying glass depends on how the glass and the object are held, relative to the eye.

  3. Cinematography - Wikipedia

    en.wikipedia.org/wiki/Cinematography

    A zoom lens allows a camera operator to change his focal length within a shot or quickly between setups for shots. As prime lenses offer greater optical quality and are "faster" (larger aperture openings, usable in less light) than zoom lenses, they are often employed in professional cinematography over zoom lenses. Certain scenes or even types ...

  4. Virgin of the Rocks - Wikipedia

    en.wikipedia.org/wiki/Virgin_of_the_Rocks

    The Virgin of the Rocks (Italian: Vergine delle rocce), sometimes the Madonna of the Rocks, is the name of two paintings by the Italian Renaissance artist Leonardo da Vinci, of the same subject, with a composition which is identical except for several significant details.

  5. Film industry - Wikipedia

    en.wikipedia.org/wiki/Film_industry

    The Hollywood Sign The cinema of the United States , often generally referred to as Hollywood, has had a profound effect on cinema across the world since the early 20th century. The United States cinema (Hollywood) is the oldest film industry in the world and also the largest film industry in terms of revenue.