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  2. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    Images displayed on a computer screen change size based on the size of the screen. A scale bar (or micron bar) is a bar of stated length superimposed on a picture. When the picture is resized the bar will be resized in proportion. If a picture has a scale bar, the actual magnification can easily be calculated.

  3. Micrograph - Wikipedia

    en.wikipedia.org/wiki/Micrograph

    Magnification is a ratio between the size of an object on a picture and its real size. Magnification can be a misleading parameter as it depends on the final size of a printed picture and therefore varies with picture size. A scale bar, or micron bar, is a line of known length displayed on a picture. The bar can be used for measurements on a ...

  4. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/wiki/1951_USAF_resolution_test...

    Glass chart. A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.

  5. Barlow lens - Wikipedia

    en.wikipedia.org/wiki/Barlow_lens

    Cone of light behind an achromatic doublet objective lens (A) without (red) and with (green) a Barlow lens optical element (B). The Barlow lens, named after Peter Barlow, is a type of diverging lens which, used in series with other optics in an optical system, increases the effective focal length of an optical system as perceived by all components that are after it in the system.

  6. Optical microscope - Wikipedia

    en.wikipedia.org/wiki/Optical_microscope

    A simple microscope uses a lens or set of lenses to enlarge an object through angular magnification alone, giving the viewer an erect enlarged virtual image. [1] [2] The use of a single convex lens or groups of lenses are found in simple magnification devices such as the magnifying glass, loupes, and eyepieces for telescopes and microscopes.

  7. Microscopic scale - Wikipedia

    en.wikipedia.org/wiki/Microscopic_scale

    The microscopic scale (from Ancient Greek μικρός (mikrós) ' small ' and σκοπέω (skopéō) ' to look (at); examine, inspect ') is the scale of objects and events smaller than those that can easily be seen by the naked eye, requiring a lens or microscope to see them clearly. [1]

  8. Fujifilm X100 - Wikipedia

    en.wikipedia.org/wiki/Fujifilm_X100

    Wide Conversion Lens WCL-X100 II – gives a magnification factor to the 23 mm fixed lens of 0.8×, providing a focal length of 19 mm (28 mm equivalent [a]) [51] Tele Conversion Lens TCL-X100 II – multiplies the 23 mm fixed lens by approximately 1.4×, providing an equivalent focal length of 33 mm (50 mm equivalent angle of view) [ 52 ]

  9. Optical resolution - Wikipedia

    en.wikipedia.org/wiki/Optical_resolution

    The original application called for placing the chart at a distance 26 times the focal length of the imaging lens used. The bars above and to the left are in sequence, separated by approximately the square root of two (12, 17, 24, etc.), while the bars below and to the left have the same separation but a different starting point (14, 20, 28, etc.)