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Thread: Do away DoF

  1. #1

    Default Do away DoF

    How to do away with Depth of Field in DSLR when I would like to have the pic with no depth of field (as taken using compact camera ?

    I am using Canon 1000D, and still using P mode.


    For some scenery shot, i would like the ppl and the background to be seen clearly.
    Last edited by fishyMonger; 21st April 2010 at 04:52 PM.

  2. #2

    Default Re: Do away DoF

    The depth of field is an integral part of any picture. There is never a case where there is "no depth of field" in a picture.

    May I presume that you mean that most part of the picture is generally sharp? And a case where only the subject is in focus, and that the background/foreground are blur?

  3. #3

    Default Re: Do away DoF

    Quote Originally Posted by Blur Shadow View Post
    The depth of field is an integral part of any picture. There is never a case where there is "no depth of field" in a picture.

    May I presume that you mean that most part of the picture is generally sharp? And a case where only the subject is in focus, and that the background/foreground are blur?
    Yes, i would like to have it sharp on the ppl and the object behind.....
    if use Autofocus, the image would have a DoF effect.. which I dun wan it when taking ppl with the backdrop behind...

  4. #4

    Default Re: Do away DoF

    You need a DOF calculator. HERE it is.
    Just adjust your parameters such that the DOF is infiniti, thats where you can get everything in the picture to be sharp

  5. #5

    Default Re: Do away DoF

    One mode you can use instead is the Av mode.

    Reduce the size of your aperture and/or move your camera further away from the people.

  6. #6

    Default Re: Do away DoF

    Quote Originally Posted by yc2005 View Post
    You need a DOF calculator. HERE it is.
    Just adjust your parameters such that the DOF is infiniti, thats where you can get everything in the picture to be sharp

    Hmmm ok... but when u guys on location, do you jus agak agak or really got count ? or with ur experience.. to gauge.. stand how far away from the ppl u r taking.....is it like this ?

  7. #7
    Senior Member ZerocoolAstra's Avatar
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    Default Re: Do away DoF

    Quote Originally Posted by fishyMonger View Post
    Yes, i would like to have it sharp on the ppl and the object behind.....
    if use Autofocus, the image would have a DoF effect.. which I dun wan it when taking ppl with the backdrop behind...
    Depth of field can be increased or decreased, but you cannot "do away with DOF"... That's like saying "do away with focal length".
    There's no such thing as 'DoF effect'...

    To INCREASE THE DEPTH OF FIELD, thus making more of the picture in-focus (ie sharp), you can either:
    1) Increase the camera ---> subject distance
    2) Use a shorter focal length (wider view) and crop after taking
    3) Reduce the aperture size (larger f-number)

    I think that's all, but I could be wrong
    For scenery where it appears that everything is in focus, read up about 'hyperfocal distance'.
    Exploring! :)

  8. #8

    Default Re: Do away DoF

    Quote Originally Posted by fishyMonger View Post
    Hmmm ok... but when u guys on location, do you jus agak agak or really got count ? or with ur experience.. to gauge.. stand how far away from the ppl u r taking.....is it like this ?
    Usually agar agar... but I got those DOF calculator apps in my handphone if I really want get precise figures. Only for static scenes tho.

  9. #9
    Senior Member sinned79's Avatar
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    Default Re: Do away DoF

    learn to love DOF! if not you are better off go back to pns. many switch from pns cos pns cannot achieve the DOF DSLR do!
    Last edited by sinned79; 21st April 2010 at 09:11 PM.

  10. #10

    Default Re: Do away DoF

    Quote Originally Posted by fishyMonger View Post
    Yes, i would like to have it sharp on the ppl and the object behind.....
    if use Autofocus, the image would have a DoF effect.. which I dun wan it when taking ppl with the backdrop behind...
    autofocus or manual focus has nothing to do with DOF.

  11. #11
    Moderator catchlights's Avatar
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    Default Re: Do away DoF

    great depth of field, means many or all parts of the photo in focus

    narrow depth of field, means only the small part of photo in sharp focus

    So no depth of field, it should be NO PART of the photo in sharp focus

    photos all blur blur, is this what you want?

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  12. #12
    Deregistered rgy1993's Avatar
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    Default Re: Do away DoF


  13. #13
    Moderator ziploc's Avatar
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    Default Re: Do away DoF

    Quote Originally Posted by fishyMonger View Post
    For some scenery shot, i would like the ppl and the background to be seen clearly.
    If the background is near to your subject, you can include both by choosing an aperture that gives a DOF deep enough to cover both (meaning both the subject and background are within the DOF) at that focal length. To do that accurately you'll need a DOF calculator or DOF wheel. If just agar agar, you can make use of the DOF preview function. If the background is very far away (e.g. near infinity), you'll need to select an aperture and set your focus to the hyperfocusing point, and have your subject located within the hyperfocusing distance and infinity.

  14. #14
    Senior Member sinned79's Avatar
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    Default Re: Do away DoF

    aiyah he just sell his 1000D then go back to pns lah. save the energy teaching him

  15. #15

    Default Re: Do away DoF

    Try a test-shot at f/4 in aperture priority mode and see if both the subject and background are sharp. If not sharp enough, try a smaller aperture, up to maybe f/8. Try not to go too much smaller than f/8 which should be somewhat near the diffraction-limited aperture (DLA) of your camera.

    If you can zoom out your lens to a wider angle, that should also help.

    If I remember correctly, larger DoF occurs at smaller apertures, shorter focal lengths (i.e. don't zoom your lens), and maybe (?) longer camera-to-subject distances.

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