DOF on a digicam

Discussion in 'Photography Equipment & Products' started by Salty_Fetus, Sep 5, 2006.

  1. Salty_Fetus

    Salty_Fetus TPF Noob!

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    I was just wondering if there were any digicams (particularly the ones with 10-12x optical zoom) that had the ability for large depth of focus. Ive been considereing a digicam instead of a new digital slr becuase I could take a digicam most anyhwere.
     
  2. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    Almost all digi-cams have a lot of DOF. In fact it can be difficult to get a shallow DOF because the lenses have very short focal lengths and small coverage.

    DOF is increased by:
    decreasing focal length
    smaller circle of confusion (lens coverage for the format)
    decreasing aperture size (increasing f/#)
    increasing camera to subject distance
     
  3. LWW

    LWW TPF Noob!

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    Ditto.

    LWW
     
  4. Salty_Fetus

    Salty_Fetus TPF Noob!

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    Oh, most of the shots I take with my digicams have everything in focus
     
  5. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    That is a large Depth of Field.

    If you want a shot with something in in focus, and other things out of focus...then you will want a small/shallow DOF. Which is harder to do with a digicam.
     
  6. Salty_Fetus

    Salty_Fetus TPF Noob!

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    Well, my canon powershot says f3.8-4.8 (or some small number like that) on the lens, so shouldnt it be able to have a fairly shallow DOF
     
  7. Peanuts

    Peanuts TPF Noob!

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    One very useful site I found is: http://www.dofmaster.com/dofjs.html

    The best way to experiment with DOF with your Powershot is to turn on the 'macro' setting, go to the widest zoom and start shooting. Unfortunately, I haven't been very successful with a Canon Powershot capturing adequte DOF of people and such due to the nature of the compact digitals.
     
  8. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    F3.8-4.8 is not really very big. F2.8 and lower would be considered a big aperture.

    Also, the size of the medium (film or sensor) play a factor in determining the DOF...and unfortunately, your sensor is very small...which makes it hard to have a shallow DOF.
     
  9. Salty_Fetus

    Salty_Fetus TPF Noob!

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    so I see, do you know if the digicams with the large zooms (10-12x) (up to 380mm I think) can provide a shallow DOF
     
  10. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Focal length also plays a part in determining DOF...so yes, those super-zoom digi-cams could probably provide a shallow(er) DOF than a small digi-cam...but you are still limited by the small sensor.
     

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