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  2. Coverage (lens) - Wikipedia

    en.wikipedia.org/wiki/Coverage_(lens)

    Coverage (lens) The coverage of a lens is the size of the image it can produce, measured as the diameter of the image circle produced by the optics. In a camera system the coverage must be large enough to cover the sensor or film used. In a view camera system, because the film plane can be moved independently of the lens plane, the lens must ...

  3. List of telescope parts and construction - Wikipedia

    en.wikipedia.org/wiki/List_of_telescope_parts...

    Optics. Mirrors and lenses are the critical light-bending components of a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before ...

  4. Photographic lens design - Wikipedia

    en.wikipedia.org/wiki/Photographic_lens_design

    The type of lens being designed is significant in setting the key parameters. Prime lens - a photographic lens whose focal length is fixed, as opposed to a zoom lens, or that is the primary lens in a combination lens system. Zoom lenses - variable focal length lenses. Zoom lenses cover a range of focal lengths by utilising movable elements ...

  5. Lens cover - Wikipedia

    en.wikipedia.org/wiki/Lens_cover

    A lens cover or lens cap provides protection from scratches and minor collisions for camera and camcorder lenses. Lens covers come standard with most cameras and lenses. Some mobile camera phones include lens covers, such as the Sony Ericsson W800, the Sony Ericsson K750 and the Sony Ericsson K550 . A more secure lens cap is the metal screw-in ...

  6. Large format lens - Wikipedia

    en.wikipedia.org/wiki/Large_format_lens

    Large format lens. Large format lenses are photographic optics that provide an image circle large enough to cover the large format film or plates used in large format cameras. Photographic optics generally project a circular image behind that is only required to have acceptable correction of aberrations over the intended film/sensor diagonal ...

  7. List of photographic equipment makers - Wikipedia

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

    Some camera companies make no lenses, but usually at least sell a lens from some lens maker with their cameras as part of a package. Note that many optical instruments such as microscopes , telescopes , spotting scopes and so forth can be used as photographic lenses; manufacturers of these types of equipment are not included here (unless they ...

  8. List of lens designs - Wikipedia

    en.wikipedia.org/wiki/List_of_lens_designs

    This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...

  9. Camera lens - Wikipedia

    en.wikipedia.org/wiki/Camera_lens

    A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically . There is no major difference in principle ...