Blurry

Discussion in 'Photography Beginners' Forum' started by candylover, Jul 18, 2010.

  1. candylover

    candylover TPF Noob!

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    Hello,

    I have a problem when taking pictures of a person. Some parts of the body and jewelry show up blurry. I do use a tripod when I take pictures, so I don't think I shake the camera. Considering that finger rings show up blurry as well. I don't think the person moves either. In the picture I took below. The model's hands and right leg are blurry. What should I do to correct this problem?
    I use the Cannon, Rebel 450D.
    Thank you for all your help! :)
    [​IMG]
     
  2. rusty9

    rusty9 TPF Noob!

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    it looks like the girl moved. one way to help prevent this is use a faster shutter speed.
     
  3. fokker

    fokker No longer a newbie, moving up!

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    I'd be tempted to say it's motion blur - what shutter speed are you using here? It doesn't exactly look like it though. Could be you have dust, mould or condensation on your lens or sensor somewhere perhaps.

    Use a shutter speed of like 1/100 and use a remote shutter release and mirror lockup to elminate any possible shake or blur and see if it still does it, and if so, is it in the same area of the frame every time.
     
  4. pbelarge

    pbelarge TPF Noob!

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    I thought that model photogs shot at 200 or 250?
     
  5. Alpha

    Alpha Troll Extraordinaire

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    She clearly moved in this picture...
     
  6. Opher

    Opher TPF Noob!

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    # Exposure Time (1 / Shutter Speed) = 1/8 second ===> 0.125 second
    # Lens F-Number / F-Stop = 67/10 ===> ƒ/6.7
    # Exposure Program = manual control (1)
    # ISO Speed Ratings = 100
    # EXIF Version = 0221
    # Original Date/Time = 2010:03:25 12:29:03
    # Digitization Date/Time = 2010:03:25 12:29:03
    # Shutter Speed Value (APEX) = 3/1
    Shutter Speed (Exposure Time) = 1/8 second
    # Aperture Value (APEX) = 5488322/1000000
    Aperture = ƒ/6.7
    # Exposure Bias (EV) = 0/1 ===> 0
    # Max Aperture Value (APEX) = 3625/1000 ===> 3.63
    Max Aperture = ƒ/3.51
    # Metering Mode = spot (3)
    # Flash = Flash did not fire, compulsory flash mode
    # Focal Length = 21/1 mm ===> 21 mm
    # Last Modified Subsecond Time = 04
    # Original Subsecond Time = 04
    # Digitized Subsecond Time = 04
    # Colour Space = sRGB (1)
    # Image Width = 261 pixels
    # Image Height = 650 pixels
    # Focal Plane X-Resolution = 4272000/878 ===> 4865.6
    # Focal Plane Y-Resolution = 2848000/584 ===> 4876.71
    # Focal Plane X/Y-Resolution Unit = inch (2)
    # Custom Rendered = normal process (0)
    # Exposure Mode = manual exposure (1)
    # White Balance = manual (1)
    # Scene Capture Type = standard (0)


    Yep its shutter speed 1/8 is way to slow
     
  7. vtf

    vtf No longer a newbie, moving up!

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    Motion blur, looks like she pivoted on her left leg and swung her right side. Higher shutter speed.
     
  8. fokker

    fokker No longer a newbie, moving up!

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    Oh well oaky there you go. For shooting people, don't go below about 1/60 (bare minimum if they are keeping nice and still) but 1/100 or 1/200 is better.
     
  9. Derrel

    Derrel Mr. Rain Cloud

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    1/8 second exposure time. That is the crux of the problem.
     
  10. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Yep, the blur is because the slow shutter speed recorded her moving.

    The overall focus was also softened by camera shake.

    To correct the problems, you need a better understanding of:
    • how a camera and lens work
    • how each individual portion of the 3 part exposure triad effect a photo (shutter speed, aperture, ISO)
    • and the relationship each element of the exposure triad has to making a photo.
    In the image you posted you needed at least 3 more stops of shutter speed and 4-6 stops more would have been better.

    But changing to a faster shutter speed to capture that motion as stopped and not blurry would mean opening up the aperture at least 3 stops.
    You were at f/6.7 so you didn't have 3 stops of aperture to work with. You were using a kit lens, right? Your max aperture at the 21mm focal length you used being f/3.51 according to the EXIF data. So, that wouldn't have worked

    To get the shutter speed you needed, and retain the aperture you used, you needed to bump the ISO 3 - 6 stops:
    • ISO 100
    • ISO 200, 1 stop
    • ISO 400, 2 stops
    • ISO 800, 3 stops
    • ISO 1600, 4 stops
    • ISO 3200, 5 stops
    • ISO 6400, 6 stops.
    The remaining consideration then becomes: Does your camera perform well noise wise above ISO 800?
     
  11. gsgary

    gsgary Been spending a lot of time on here!

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    You must be using continous lighting because flash would have been ok
    Up your ISO so you can up your shutter speed those lights must be very dim
     
  12. candylover

    candylover TPF Noob!

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    It seems that every time I increment the shutter speed. The picture comes out really dark even though there's a lot of light in the room. What should I do?
    Thanks!
     

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