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Thread: Freezing motion

  1. #1

    Default Freezing motion

    Hi, I've tried taking pics of my little niece as she jumps off my bed but I notice the pics are usually blur.

    What I did was to focus on her face before the jump, maintained focus-lock (half-squeeze) and then triggered the shot as she jumped.

    It's quite impossible to do focusing and to trigger the shot while she was in mid-air (perhaps the kit lens are too slow...?).

    Any techniques on producing focused pics?





    Last edited by janzguy81; 9th May 2005 at 12:31 AM.

  2. #2
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    Under such near conditions, I think you have to prefocus first. Have to watch out that she's not nearer than the min focusing distance too. I think the shutter speed still plays a part here as there's quite a lot of ambient light. Maybe you will like to try to shoot at max sync speed and smallest possible aperture?

  3. #3

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    Quote Originally Posted by Splutter
    Under such near conditions, I think you have to prefocus first. Have to watch out that she's not nearer than the min focusing distance too. I think the shutter speed still plays a part here as there's quite a lot of ambient light. Maybe you will like to try to shoot at max sync speed and smallest possible aperture?
    Tks for the prompt reply Splutter.

    I did what was mentioned, to do prefocusing...but I was wondering isn't it out-of-focus the moment she jumps nearer to my lens?

    Those pics are taken at 1/80s F5 ISO 200. Perhaps I should shoot at mex sync speed and smaller aperture as you've said...will try it!

  4. #4
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    By prefocusing, it means u focus on the anticipated pt where she will be when the pic is taken, not before she jumps leh. Hope it helps

  5. #5

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    The second image is so nice. The smile and expression on the face melts the heart.
    The motion blur works well in that shot.

  6. #6
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    this is just my guess.

    1) you got to focus on the impact area. where her face is likely to be where you wanted the shot.

    2) it cant be too near unless your lens can focus near (near macro capabilities).

    3) forced flash should work well in this instance.

    4) your timing and lots of patience.

    5) lots of luck.

  7. #7
    Senior Member denniskee's Avatar
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    you will need to use either

    1) AI servo.
    2) Stop down the aperture such that the DOF is enough to cover the max (before jump) and min (landing point) dist between your niece and the camera.

    Make sure

    1) Min (landing point) dist between your niece and the camera is not smaller than the lens min. foucsing dist.
    2) Shutter speed is fast enough (above 1/125) w/o flash.
    3) If doing flash photography, than 1/60 should be safe, but make sure refresh rate of the flash is fast enough for your intended shooting rate. Else the 2nd or 3rd photos will be under-exposed.

    Hope this help, have fun.
    photography makes one sees things from all angles.

  8. #8
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    use continues light, set the lighting, use high speed frame capture, big aperture and fast shutter speed, bost the ISO.

    if still cannot,..... borrow 1D or D2H and use 8fps
    ubans.com

  9. #9
    Senior Member denniskee's Avatar
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    wah bro, 8fps, $$$ setup lay.
    photography makes one sees things from all angles.

  10. #10

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    Quote Originally Posted by seankyh
    The second image is so nice. The smile and expression on the face melts the heart.
    The motion blur works well in that shot.
    Thanks for the kind comments...that's very encouraging!

    Quote Originally Posted by denniskee
    Make sure
    1) Min (landing point) dist between your niece and the camera is not smaller than the lens min. foucsing dist.
    2) Shutter speed is fast enough (above 1/125) w/o flash.
    3) If doing flash photography, than 1/60 should be safe, but make sure refresh rate of the flash is fast enough for your intended shooting rate. Else the 2nd or 3rd photos will be under-exposed.

    Hope this help, have fun.
    Does using 1st or 2nd curtain sync makes a difference to such pics?

  11. #11
    Senior Member denniskee's Avatar
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    Quote Originally Posted by janzguy81
    Thanks for the kind comments...that's very encouraging!


    Does using 1st or 2nd curtain sync makes a difference to such pics?

    May be these 2 sites can be of help to you

    http://www.vividlight.com/articles/611.htm

    http://hacks.oreilly.com/pub/h/1771
    photography makes one sees things from all angles.

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