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Thread: Bokeh!

  1. #1
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    Default Bokeh!

    I want to know how can i create bokeh.
    The aperture has been set at max f/4.0,allowing minimium light to enter and shutter is at 1/4000s.
    My intended subject is still as blur as everything when i only want the background to be blur.

    How can i address the issue?
    lense is a 28mm-10mm f/2.8-f/4.0
    Last edited by dotaboy; 25th December 2007 at 01:35 AM.

  2. #2
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    Default Re: Bokeh!

    Quote Originally Posted by dotaboy View Post
    I want to know how can i create bokeh.
    The aperture has been set at max f/4.0,allowing minimium light to enter and shutter is at 1/4000s.
    My intended subject is still as blur as everything when i only want the background to be blur.

    How can i address the issue?
    lense is a 28mm-10mm f/2.8-f/4.0
    this should have been posted under newbie section i suppose.

    i think you got your understanding of aperture haywired alittle. at f4, more light is able to enter as compared to a value say f16 or f22. the smaller the f value, the more light that can enter and vice versa. bokeh can better be achieved with lens of bigger apertures such as f1.8 or bigger

    try zooming in on your subject and going closer to it when shooting to create that depth of field i suppose u wanted?

  3. #3
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    Default Re: Bokeh!

    Quote Originally Posted by sprintist View Post
    this should have been posted under newbie section i suppose.

    i think you got your understanding of aperture haywired alittle. at f4, more light is able to enter as compared to a value say f16 or f22. the smaller the f value, the more light that can enter and vice versa. bokeh can better be achieved with lens of bigger apertures such as f1.8 or bigger

    try zooming in on your subject and going closer to it when shooting to create that depth of field i suppose u wanted?

    isn't that what i said..?
    At f/4.0 to allow minium light to enter.
    The smaller the f/x value,the more light is allowed to enter.

  4. #4

    Default Re: Bokeh!

    To have a nice Bokeh the back ground has to be at a distance to the subject. Shooting at the longer end of the lens and with the biggest aperture will help. For your case, do your really need a shutter speed of 1/4000? it will be better to use the 2.8f, 1/2000 if possible. At f4 the subject and the background has to be at a significant distance to achieve a nice bokeh.
    Canon 30D, G11, 50 f1.8II, 10-22 f3.5-4.5, 24-70 f2.8L, 70-200 f2.8L IS, EX580II

  5. #5
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    Default Re: Bokeh!

    Quote Originally Posted by dotaboy View Post
    isn't that what i said..?
    At f/4.0 to allow minium light to enter.
    The smaller the f/x value,the more light is allowed to enter.
    hmm, f/4 minimum light? i dont get you..minimum would be f22 etc right?

  6. #6
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    Default Re: Bokeh!

    i think he confused? he thinks bigger means F4> ?(eg. F5.6 F8...)

  7. #7

    Default Re: Bokeh!

    i think first things first is that sometimes we get lazy and type f/22 as f22 or f/1.8 as f1.8.

    smaller the f-number(don't care the '/') for eg f1.8, your background will be blurrer. f22, background will be sharper.

    then again looking at your question again, you say your subject is blur. since u shoot at 1/4000s and i assume your subject is still, then the problem shouldn't be handshake but focusing. so there's something wrong with either you, the camera or the lens. another thing is that just maybe your DOF is too thin, leading to only certain parts of your subject in focus.
    Last edited by dreamzcape; 25th December 2007 at 04:50 PM.
    flickr me here ;)

  8. #8
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    Default Re: Bokeh!

    1. Full Zoom or in range
    2. Make sure the subject is in range of the zoom
    voila Bokeh!

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