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  2. Grandma's Reading Glass - Wikipedia

    en.wikipedia.org/wiki/Grandma's_Reading_Glass

    Grandma's Reading Glass is a 1900 British silent trick film, directed by George Albert Smith, featuring a young boy who borrows a huge magnifying glass to focus on various objects. The film was shot to demonstrate the new technique of close-up .

  3. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    A magnifying glass, which uses a positive (convex) lens to make things look bigger by allowing the user to hold them closer to their eye. A telescope , which uses its large objective lens or primary mirror to create an image of a distant object and then allows the user to examine the image closely with a smaller eyepiece lens, thus making the ...

  4. Magnifying glass - Wikipedia

    en.wikipedia.org/wiki/Magnifying_glass

    A pen seen through a magnifying glass Jim Hutton as detective Ellery Queen, posing with a magnifying glass. A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. Beyond its primary function of magnification, this simple yet ingenious tool serves a ...

  5. History of optics - Wikipedia

    en.wikipedia.org/wiki/History_of_optics

    It has been proposed that glass eye covers in hieroglyphs from the Old Kingdom of Egypt (c. 2686–2181 BCE) were functional simple glass meniscus lenses. [40] The so-called Nimrud lens, a rock crystal artifact dated to the 7th century BCE, might have been used as a magnifying glass, although it could have simply been a decoration. [41] [42 ...

  6. Lens - Wikipedia

    en.wikipedia.org/wiki/Lens

    For instance, using a magnifying glass of 5 cm focal length, held 20 cm from the eye and 5 cm from the object, produces a virtual image at infinity of infinite linear size: M = ∞. But the angular magnification is 5, meaning that the object appears 5 times larger to the eye than without the lens.

  7. Zograscope - Wikipedia

    en.wikipedia.org/wiki/Zograscope

    Large table-top viewer for vue d'optique prints. Late 18th century An example of a picture designed for viewing under a zograscope equipped with a mirror, its text written right-to-left. A zograscope is an optical device for magnifying flat pictures that also has the property of enhancing the sense of the depth shown in the picture