Full-frame sensors can't do wide angle - NOT!

Discussion in 'Digital Photography' started by David J. Littleboy, Sep 22, 2005.

  1. There are in fact two quite distinct varieties of chromatic aberration.
    Longitudinal Chromatic Aberration is the one you describe: the lens
    focusses light of different wavelengths (colours) at a different
    distance from the lens. This may cause a little fringing, but its major
    effect is loss of sharpness. Transverse Chromatic Aberration is an
    effect in which the lens produces images at different magnifications
    (sizes) for light of different colours. Its main effect is distinct
    colour fringing. It is one of the harder aberrations to control by lens
    design, but fortunately is relatively easy to cure in software (unlike
    longitudinal CA, which is impossible to cure in software).

    Some lenses are very good at controlling one type and very bad at the
    other, and vice-versa.

    In the context of this discussion it seems clear that transverse CA is
    the one whose effects you were discussing, whereas the one for which you
    gave the explanation is longitudinal CA.

    David Littlewood, Sep 28, 2005
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