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Thread: blackground blurring

  1. #1

    Default blackground blurring

    can anyone teach me how to blur the background while having object focused?
    am i able to do it with my kit lens 18-55 IS or 70-200 L4

  2. #2
    Member jasonteoch's Avatar
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    Default Re: blackground blurring

    usually we will set the camera to its lowest aperture value (completely open)

  3. #3
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    Default Re: blackground blurring

    the term we use is call bokeh... try to read more on DOF to get that effect.

  4. #4

    Default Re: blackground blurring

    Quote Originally Posted by bugsz View Post
    can anyone teach me how to blur the background while having object focused?
    am i able to do it with my kit lens 18-55 IS or 70-200 L4
    The "blurness" of the background is dependent on the subject distance, the background distance and aperture size. The closer your subject is relative to the background and the larger your aperture (note: larger aperture = smaller f number) is, the more blur ur background will be.

    Assuming that
    | = background
    x = subject
    c = camera

    |_____x________c = less blur
    |_________x____c = more blur

    Also, try opening your aperture to the max (smallest f number) that your lens can support (for 18-55 kit lens, that would be f/3.5 at the 18mm end and f/5.6 at the 55mm end).

    Lastly, the kit lens unfortunately is unable to "blur" off much of the background (given the relatively small aperture compared to, say, a f/2 lens). Your best bet would be to keep ur subject as close to you as possible with a far off background. If that cannot be done, you will need a faster (smaller f number) lens, such as the cheap and excellent 50mm f/1.8.

  5. #5

    Default Re: blackground blurring

    try youtube if u dun like reading (like me) for some interesting videos on DOF. its quite comprehensive.

  6. #6
    Member Deming86's Avatar
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    Default Re: blackground blurring

    1. Go as close to the subject as possible
    2. Widest Aperture you can get (smallest Aperture Value)
    3. Longest end of your zoom (70-200 => use the 200 end)

    To get max bokeh possible. its a combination so give and take =]
    Shoot with your heart, not for greed/ego..

  7. #7
    Senior Member giantcanopy's Avatar
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    Default Re: blackground blurring

    Quote Originally Posted by zerokiller View Post
    the term we use is call bokeh... try to read more on DOF to get that effect.
    Bokeh is a qualitative term to describe the blurring / oof, and it is can good or bad. From the starting thread do not think bugsz is talking about the quality of the blur here, but rather have more or less of the oof areas.

    Ryan

  8. #8
    Member Deming86's Avatar
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    Default Re: blackground blurring

    btw you might wanna manually select the AF point to pinpoint where you want the focus to be. cheers!
    Shoot with your heart, not for greed/ego..

  9. #9

    Cool Re: blackground blurring

    Although the lens is important, do make use of other factors as mentioned to assist u achieve what u want.

  10. #10

    Default Re: blackground blurring

    Quote Originally Posted by Deming86 View Post
    1. Go as close to the subject as possible
    2. Widest Aperture you can get (smallest Aperture Value)
    3. Longest end of your zoom (70-200 => use the 200 end)

    To get max bokeh possible. its a combination so give and take =]
    And 4, get the background as far as possible from your subject.
    Research Institute for Unicultural Visual Arts - Riuva.com

  11. #11
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    Default Re: blackground blurring

    not neccessary, should be object as near to the lens as possible, bg need not be very far.

  12. #12
    Senior Member giantcanopy's Avatar
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    Default Re: blackground blurring

    Quote Originally Posted by ngck12 View Post
    not neccessary, should be object as near to the lens as possible, bg need not be very far.
    Whether you want the object say a person as near the lens as possible will depend on the composition that you are trying to achieve.

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