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12/11/2004 12:24:07 PM · #26 |
Originally posted by koltrane75:
What does "bokeh" mean? |
It appears to be a word that is idiosyncratic to photography because it appears in no dictionary that I've ever found, including my unabridged Webster's.
Definition on the web can be found here. |
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12/11/2004 02:10:31 PM · #27 |
To elaborate on the bokeh discussion...
The source of the word "bokeh" is, AFAIK, Japanese. It does refer to the quality of the OOF portions of a photo. How the OOF portions (especially point sources of light) are rendered depends a great deal on lens design. Some of the things that affect bokeh are:
- Number of aperture blades
- Shape of aperture blades
- Over (or under) correction for spherical aberration
Great bokeh does not necessarily require a very expensive lens. Some less expensive lenses are known for their excellent bokeh. Very inexpensive lenses are less likely to have great bokeh, though, since they tend to have distinctly non-circular aperture openings, which is not a good thing for bokeh.
Mirror lenses also have notoriously bad bokeh, because of the central obstruction from the secondary mirror. OOF highlights are rendered as donut shapes.
TMI?
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12/11/2004 02:30:48 PM · #28 |
Originally posted by koltrane75:
What does "bokeh" mean? |
Here's a detailed essay on Bokeh.
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12/11/2004 02:31:52 PM · #29 |
Originally posted by kirbic:
To elaborate on the bokeh discussion...
The source of the word "bokeh" is, AFAIK, Japanese. It does refer to the quality of the OOF portions of a photo. How the OOF portions (especially point sources of light) are rendered depends a great deal on lens design. Some of the things that affect bokeh are:
- Number of aperture blades
- Shape of aperture blades
- Over (or under) correction for spherical aberration
Great bokeh does not necessarily require a very expensive lens. Some less expensive lenses are known for their excellent bokeh. Very inexpensive lenses are less likely to have great bokeh, though, since they tend to have distinctly non-circular aperture openings, which is not a good thing for bokeh.
Mirror lenses also have notoriously bad bokeh, because of the central obstruction from the secondary mirror. OOF highlights are rendered as donut shapes.
TMI? |
no, not TMI, but TMA (too many acronyms) :) |
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