question

Discussion in 'Photography Beginners' Forum' started by Guinness Man, Sep 28, 2009.

  1. Guinness Man

    Guinness Man TPF Noob!

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    So after reading these forums I have learned that you can adjust the focal point and how quickly it falls off (headshots) to make the background blurry. I have tried this with the aperature set as low as it can and as high as it can and the pics look the same. from f2.7-f8.0.

    What am I doing wrong?

    Shutter was at 1/100 and ISO at 400

    thanks
     
  2. TJ K

    TJ K No longer a newbie, moving up!

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    It would be helpful to tell us what type of camera you are using. P&S, dslr? To get that background nice and OOF good bokeh it depends on how close you are to your subject and how far away the background is. The further the background the more out of focus the background will be. Telephoto is better for that OOF background like the 70-200 f/2.8 gl
    Tj
     
  3. Goontz

    Goontz TPF Noob!

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    It's known as Depth of Field (DOF). To do this, you want to use a small f/#. The distance between the subject and the background will also play a role. Can you post some examples (with exif data)? That would help people offer suggestions on what to change.
     
  4. Guinness Man

    Guinness Man TPF Noob!

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    Ok Ill do that...

    Camera: Cannon Powershot S5 IS

    DUMB Pic, just took it real quick out back
    [​IMG]

    EXIF:
    Camera:Canon PowerShot S5 IS
    Lens:6 - 72 mm
    Exposure:Manual exposure, 1/30 sec, f/2.7, ISO 400
    Flash:Off, Did not fire
    Focus:Single with a depth of field from about 65cm to infinity
    File:2,448 × 3,264 JPEG (8.0 megapixels)
     
  5. Goontz

    Goontz TPF Noob!

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    The aperture does show as f/2.7, but this is what catches my eye: "Focus:Single with a depth of field from about 65cm to infinity." This is saying that the focus is not on a particular depth or point, but rather to infinity, meaning as far as you can see will be in focus. Hopefully someone more knowledgeable about your particular camera can chime in on how to change that, if it's possible.
     
  6. TJ K

    TJ K No longer a newbie, moving up!

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    Your main problem is that you are to far from the object resulting in a greater DOF get closer and you could have better results but the best will come from some type of camera w/ a decent lens and full control of the camera i.e. slr
     
  7. Plato

    Plato TPF Noob!

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    There are three factors related to DoF, aperture (lens opening), subject distance and physical sensor size. The sensors with P&S cameras are either "small" (if I'm being kind) or "tiny dinky" (if I'm being honest). The sensor size is the dominant factor affecting the DoF in your picture. The subject distance is second. The aperture is third.
     
  8. Guinness Man

    Guinness Man TPF Noob!

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    Im guessing its not possible to adjust sensor size in a P&S. Is that correct. If so what can I do with my camera to take good portrait shots with a faded background.

    Ive learned that I should get closer and set my aperture low. Any other possibilities. I mean it is a pretty nice camera, I realize I'm limited with a P&S.
     
  9. Goontz

    Goontz TPF Noob!

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    Correct. Plato is referring to the physical size of the part inside the camera that 'records' the light for pictures. It's not something that's adjustable on any camera.
     
  10. Turnerea

    Turnerea TPF Noob!

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    whoah. focus information in your exif?? Am I missing something?? I didn't know Canon did that. I have a Rebel, and was under the impression that despite the camera "knowing" subject distance (like for TTL flash metering) it didn't write it to exif.

    Is there a way to get it????
     
  11. Samanax

    Samanax TPF Noob!

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    Yes, you can't change the sensor size of your P&S.
    4 things to keep in mind...you want to use a large aperture, a long focal length (zoom out), get the camera close to the subject, make sure the subject is far from background.

    Back to Basics - Depth Of Field

    Depth Of Field

    Tutorial: Depth Of Field

    Depth Of Field Tutorial

    Examples For Understanding Depth Of Field

    Understanding Depth Of Field

    Controlling Depth Of Field

    Tutorials: Depth Of Field

    Understanding Depth Of Field In Photography
     
  12. Guinness Man

    Guinness Man TPF Noob!

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    Thank you. These were the parameters I was looking for and what I will try. Thanks to all of you. I will eventually get this stuff. Its just hard reading something and thinking SWEET! I got it... going and doing it and not getting the results you want based on camera limitations. Once I take that shot that comes out the way I want it to, Ill be well on my way.

    :)

    Thanks again.
     

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