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Thread: bokeh

  1. #1
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    Default bokeh

    btw, can anyone explain 2 me wat is a 'bokeh'?

  2. #2
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    Yup, what is bokeh anyway?

  3. #3
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    ? bokeh? is that indonesian word?

    if yes it means " bangkrupt"


  4. #4

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    "bokeh" is Japanese term for "circle of confusion", i think
    Last edited by mervlam; 15th November 2003 at 12:19 PM.

  5. #5
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    Quote Originally Posted by mervlam
    "bokeh" is Japanese term for "circle of confusion"
    hmm this sounds more logical cannot think how the word 'bankrupt' has gotta do wif photography unless if we spend too much in equips haha

    anyway, ... i c the word 'bokeh' very often in CS. so can someone define 'circle of confusion'?

  6. #6

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    Quote from Canon Marketing (S'pore) Website Glossary
    http://www.canon.com.sg/index.cfm?fu...ype=glossary#c

    "Circle of confusion

    Since all lenses contain a certain amount of spherical aberration and astigmatism, they cannot perfectly converge rays from a subject point to form a true image point (i.e., an infinitely small dot with zero area). In other words, images are formed from a composite of dots (not points) having a certain area, or size. Since the image becomes less sharp as the size of these dots increases, the dots are called “circles of confusion.” Thus, one way of indicating the quality of a lens is by the smallest dot it can form, or its “minimum circle of confusion.” The maximum allowable dot size in an image is called the “permissible circle of confusion.” "

    Er... one thing, i'm not very sure if bokeh REALLY means circle of confusion. Anyway, there is a nice picture that describes the situation mentioned above.

  7. #7
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    Bokeh refers to the way the background is blurred. Good bokeh means that
    the blurriness(?) is smooth and looks natural. Bad one means that the background looks somewhat artificial in the sense that the edges between light and dark areas are sharp and pronounced.

    Some people think that this is highly subjective notion but they are wrong as bokeh can be quantified by a set of numbers. Mathematically speaking it is related to the second order perturbation effects in the glass of a lens.

    Cheers

  8. #8
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    Thumbs up

    thanks guys

  9. #9
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    You can read up a little more about bokeh at this site

    http://www.kenrockwell.com/tech/bokeh.htm

  10. #10
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    Ok, so bokeh means bankrupt in indonesian. Learn something new everyday.

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