Difference between revisions of "Bokeh"
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| image_text= Distracting ring bokeh<br>from a mirror telephoto lens | | image_text= Distracting ring bokeh<br>from a mirror telephoto lens | ||
| − | |image_by= | + | |image_by= Uwe Kulick |
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| − | '''Bokeh''' (Japanese "boke" = blur or haze) is how | + | '''Bokeh''' (Japanese "boke" = blur or haze) is how a [[lens]] draws unsharp image areas. The effect becomes notable when the unsharp back- and/or foreground has significant contrasts, especially when small light areas contrast to darker surroundings. A typical bokeh effect is given by some lenses with six-blade aperture. Light points of the unsharp fore- or background are projected by these lenses as hexagonal lighter areas onto the image. Portraiture needs lenses with a pleasant or a soft undisturbing bokeh. Almost round apertures given by multi-blade [[diaphragm]]s are always a good precondition for a nice Bokeh, but don't necessarily deliver one. It depends on where in the lens the diaphragm is placed. In some extra-short lens constructions and zoom lenses necessary compromises might reduce nice bokeh results despite of nearly round aperture. |
[[Category:Lens]] | [[Category:Lens]] | ||
Revision as of 03:45, 17 February 2011
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| Smooth and unobtrusive bokeh (Kodak Anastigmat barrel lens) image by Voxphoto (Image rights) |
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| Distracting ring bokeh from a mirror telephoto lens image by Uwe Kulick (Image rights) |
Bokeh (Japanese "boke" = blur or haze) is how a lens draws unsharp image areas. The effect becomes notable when the unsharp back- and/or foreground has significant contrasts, especially when small light areas contrast to darker surroundings. A typical bokeh effect is given by some lenses with six-blade aperture. Light points of the unsharp fore- or background are projected by these lenses as hexagonal lighter areas onto the image. Portraiture needs lenses with a pleasant or a soft undisturbing bokeh. Almost round apertures given by multi-blade diaphragms are always a good precondition for a nice Bokeh, but don't necessarily deliver one. It depends on where in the lens the diaphragm is placed. In some extra-short lens constructions and zoom lenses necessary compromises might reduce nice bokeh results despite of nearly round aperture.
