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"Bokah" ???
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Hi Guys,
just a quick one, might be stupid.
but what is bokah that i keep hearing about
i am thinking it is something to do with dof blur??Cheers
lol…it is bokeh. It is the appearance of out of focus areas. Do a google search for it?
From wikidpedia:
Bokeh (from the Japanese boke ぼけ, “blur”[1]) is a photographic term referring to out-of-focus areas in an image produced by a camera lens. The aesthetic qualities of the bokehs produced by various lenses are open to dispute, but it is generally conceded that an out-of-focus background image can at the very least reduce distractions and emphasize the primary subject.it’s a term used by our friends across the atlantic, it’s used to reference the out of focus or depth of field. Ya know take a shot of Ant Betty, at f2.8 throwing the background out of focus.
There’s a comparison of the canon 50mm f1.4 and 50mm 1.8 at
http://photo.net/equipment/canon/ef50/Before reading this I could never really visualise what people meant when they said one lens had better bokeh than another. The first shot of the out of focus highlights is really good and lower down there’s a shot of a playground, both demonstrate the differences in bokeh.
//Cian
Just to add to what has been said, it is generally accepted that the more aperture blades your lens has the more pleasing the bokeh will be. This is a general rule but is not the only influencing factor to achieve pleasant bokeh.
Take for instance two of Canon’s 50mm lenses:
EF50 f1.8 ii
EF50 f1.4 USMThe 1.8 has 5 aperture blades whereas the 1.4 has 8 blades, therefor the 1.4 lens gives the more pleasing out of focus qualities.
The following are not ideal examples but they should give you an idea.
50mm f1.8 (5 blade)
Note the pentagonal shapes in the out of focus areas:-
Now here is the 50mm f1.4 (8 blade)
Little bit smoother dont you think:-
we use the term out of focus when talking about pictures, bokeh is a way to describe how well the lens does in transitioning stuff out of focus. rarely will you here someone say that picture has great bokeh, when you do they usually turn out to be gear heads that can recite mathematical equations of how fast the shutter speed has to be in relation to how fast the moon is moving in order to get it pin sharp, but still can’t manage to take an interesting picture… :lol:
beth
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