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  2. Abbe number - Wikipedia

    en.wikipedia.org/wiki/Abbe_number

    Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...

  3. List of photographic equipment makers - Wikipedia

    en.wikipedia.org/wiki/List_of_photographic...

    Keystone (126 and 110 cameras with built-in flash, movie cameras) Kiron Lenses. Konica. Konishiroku (see Konica Minolta) Konica Minolta (as of 2006 may still manufacture on an OEM basis for Sony) Leitz (formerly owned Leica) Leidolf. Lord see Okaya.

  4. Diffraction-limited system - Wikipedia

    en.wikipedia.org/wiki/Diffraction-limited_system

    An optical instrument is said to be diffraction-limited if it has reached this limit of resolution performance. Other factors may affect an optical system's performance, such as lens imperfections or aberrations, but these are caused by errors in the manufacture or calculation of a lens, whereas the diffraction limit is the maximum resolution ...

  5. Low-dispersion glass - Wikipedia

    en.wikipedia.org/wiki/Low-dispersion_glass

    Low-dispersion glass ( LD glass) is a type of glass with reduced chromatic aberration, meaning the refractive index is not as strongly dependent on visible wavelength. In other words, the light passing through the glass has a smaller spread or dispersion between its constituent colors, resulting in a reduced " rainbow effect" at high-contrast ...

  6. List of Canon products - Wikipedia

    en.wikipedia.org/wiki/List_of_Canon_products

    The last non-EOS based SLR camera produced by Canon, the Canon T90 of 1986, is widely regarded as the template for the EOS line of camera bodies, although the T90 employed the older FD lens-mount standard. For a detailed list of EOS Film and digital SLR cameras, see Canon EOS.

  7. Canon L lens - Wikipedia

    en.wikipedia.org/wiki/Canon_L_lens

    The 70-200 mm f/2.8L lens. Canon's series of L lenses (Luxury lenses) are a professional line of photography lenses made by Canon.Canon has sold zoom and prime L-series lenses for the discontinued FD lens mount, for the current EF lens mount used on all Canon EOS SLR cameras and for the RF mount used on mirrorless interchangeable-lens cameras.

  8. Canon EOS - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS

    Canon EOS. Canon EOS ( Electro-Optical System) is an autofocus single-lens reflex camera (SLR) and mirrorless camera series produced by Canon Inc. Introduced in 1987 with the Canon EOS 650, all EOS cameras used 35 mm film until October 1996 when the EOS IX was released using the new and short-lived APS film. In 2000, the D30 was announced, as ...

  9. Abbe sine condition - Wikipedia

    en.wikipedia.org/wiki/Abbe_sine_condition

    In optics, the Abbe sine condition is a condition that must be fulfilled by a lens or other optical system in order for it to produce sharp images of off-axis as well as on-axis objects. It was formulated by Ernst Abbe in the context of microscopes. [ 1] The Abbe sine condition says that. the sine of the object-space angle should be ...

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