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Thread: Digital Camera recording mode

  1. #1
    Join Date
    Mar 2006

    Default Digital Camera recording mode

    I've using a Canon S1 IS digital camera set at 640 x 480 30 fps to film
    propeller driven 'planes

    The results are good except for the propellers look unreal i.e. turning very slowly

    Is this the case with camcorders , if not what's the difference between the two

    Thanks for any help


  2. #2
    Join Date
    May 2004
    Kansas City, Missouri, USA, Earth, Sol, Milky Way, Local Group, Universe 42


    All motion picture cameras can have this effect on apparent propeller speed. It's caused by the camera frame rate being a near multiple of the prop revolutions per second. At some prop speeds the camera can actually make it look like it's going in reverse.

    Not much can be done about it since we can't change the camera frame rate without introducing extra editing headaches. Increasing the exposure time per frame will make the prop blades blur a bit, maybe enough to hide the slow speed appearance. Or you can ask the plane pilot to change his engine rpms.
    Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."

    System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
    Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
    Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70

  3. #3
    Join Date
    Feb 2004
    Bracknell, Berkshire, UK


    Crusty's right. The effect you are seeing is called 'Aliasing'. maybe you can slow down the shutter speed slightly toget a blurred image on each frame?

  4. #4
    Join Date
    Mar 2006

    Default S1 recording

    Thanks for your comments

    most helpful


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