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  2. Defocus aberration - Wikipedia

    en.wikipedia.org/wiki/Defocus_aberration

    High f-numbers, in the f / 16 to f / 32 range, are highly tolerant of defocus, and consequently have large depths of focus. The limiting case in f-number is the pinhole camera, operating at perhaps f / 100 to f / 1000, in which case all objects are in focus almost regardless of their distance from the pinhole aperture.

  3. Perspective control - Wikipedia

    en.wikipedia.org/wiki/Perspective_control

    A darkroom technician can correct perspective distortion in the printing process. It is usually done by exposing the paper at an angle to the film, with the paper raised toward the part of the image that is larger, therefore not allowing the light from the enlarger to spread as much as the other side of the exposure.

  4. Perspective distortion - Wikipedia

    en.wikipedia.org/wiki/Perspective_distortion

    Below, a series of four photos shows an object framed as nearly the same as possible with four different lenses. As a result of the different angle of view of each lens, the photographer moved closer to the object with each photo. Note that the angle of view changes significantly (compare the background in each photo), and the distance between ...

  5. Digital camera modes - Wikipedia

    en.wikipedia.org/wiki/Digital_camera_modes

    A separate but often related distinction is between focus priority and release priority – whether the camera will take a picture when the subject is out of focus or not. In focus priority, the camera will only take a picture when the subject is in focus (as detected by the AF system), while in release priority, the camera will take a picture ...

  6. Optical aberration - Wikipedia

    en.wikipedia.org/wiki/Optical_aberration

    On this account the lines D and G' are united for ordinary photographic objectives; the optical as well as the actinic image is chromatically inferior, but both lie in the same place; and consequently the best correction lies in F (this is known as the actinic correction or freedom from chemical focus). [8]

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