QUOTE(Agito666 @ Oct 31 2011, 05:59 PM)
a) the bigger the aperture is...the creamier bokeh.
eg: f/5.6 bokeh is not creamier than f/1.4
b) distance in between subject and background....
eg: when the subject is closer to lens, the creamier the bokeh... if the aperture is fixed.
this one i really walk close enough to the subject, almost is minimum focus range already... 35mm f/1.8 wide open.
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or a zoom lens can do same thing...
c) Full frame bokeh is nicer then crop factor, but pricy

Added on October 31, 2011, 9:20 pmanyway....saw this in facebook
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Creamy/Smooth/Harsh/Swirly/Dreamy are actually how the out of focus elements are rendered or in other words, the characteristics of the defocused parts of the picture. For example, a 50 f/1.4G produces a smoother
bokeh than a 50 f/1.8D when both are shot @f/1.8
The correct term to be used is
shallower Depth of Field which is influenced by the distance of the subject from the lens, distance of subject from the background, size of camera sensor and the aperture of the lens used. For example shooting a subject @f/1.4 will produce a shallower Depth of Field compared to shooting the same subject @f/1.8..
This post has been edited by -kytz-: Oct 31 2011, 10:32 PM