EOS-1D Mark III outperformed by 35mm disposable camera

Discussion in '35mm Cameras' started by adminforto, Feb 23, 2007.

  1. adminforto

    adminforto Guest

    Strange, but true.

    I made a test pattern composed of red dots and placed some distance away
    from
    EOS-1D Mark III and adjusted the zoom to match a 35mm disposable camera.
    It turns out that my red patter appeared green on the image captured by EOS.
    The 35mm film on the other hand captured my pattern in undistorted red
    color.

    After doing some research on the sensor technology I've found out
    that all mosaic type CCD sensors are not able to capture correctly the color
    (chrominance) portion of an image
    element that is as small as the CCD element.
    Which means that since it take 8 CCD element to determine color, source
    image need to have uniform color
    with areas that are at least 8 pixels large for correct color acquisition.

    That incredible technical deficiency makes all the cameras that use mosaic
    patterns
    a false image producers and logically they should not be used in
    applications
    where true images are required. In scientific, medical, law enforcement and
    may other application
    areas this type of false images would substanicialy degrade performance
    quality.

    The cameras with mosaic type sensors should only be used for entertainment
    purposes.

    If You want to capture true images with undistorted color than the cheapest
    way is to use
    35mm disposable camera.
     
    adminforto, Feb 23, 2007
    #1
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  2. adminforto

    Matthew Winn Guest

    Nothing can capture colour perfectly. Most people don't worry about
    it and concentrate on getting the best image possible regardless of
    the colour distortion. If you really want to capture something with
    perfect colour, throw a net over it and drag it home.
     
    Matthew Winn, Feb 23, 2007
    #2
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  3. adminforto

    Lionel Guest

    **** off troll.
     
    Lionel, Feb 23, 2007
    #3
  4. adminforto

    Annika1980 Guest

    When did you conduct this test? (liar)
    Can we see the results? (liar)
     
    Annika1980, Feb 23, 2007
    #4
  5. I would be interested in seeing the results - could you
    post the pictures you took with the EOS and the disposable?.
     
    Nicholas O. Lindan, Feb 23, 2007
    #5
  6. OMG!! We better notify Canon of these findings!!...........NOT!!
    Sorry, I just don't buy it.
    Helen
     
    helensilverburg, Feb 23, 2007
    #6
  7. adminforto

    adminforto Guest

    I can post the Canon but for the disposable one needs
    a scanner with 3 CCD and I do not have one.

    The disposable was developed on analog type legacy photo processing
    equipment.

    Also I can post a link to the test patter so anybody can print it and get
    the same effect with his own camera.
     
    adminforto, Feb 23, 2007
    #7
  8. adminforto

    Guest Guest

    post whatever you have, full size, exif info intact. and while your at
    it, how about a photo *of* the 1d mark iii you claim to have and the
    mystery unnamed disposable camera, side by side.
     
    Guest, Feb 23, 2007
    #8
  9. Strange, yes.


    Please post the results. And don't waffle on about how you can't scan
    the analog one without a 3CCD scanner - I have a nice, cheap flatbed
    that will do a comfortable 1200 dpi scan. All *you* need to do is to
    make a good print of at least 7x5 (pref 11x8) and scan it at 600 dpi
    or higher.

    Which presumably you must have already done, or how can you possibly
    be resolving detail down to this size?

    Yes, Bayer CCD's can't resolve perfect colours at 'actual pixel'
    resolution, but *no-one* said it can (and no camera can - Nyquist
    still rules when you get down to the bottom, even for a Foveon or
    3CCD). And for the sort of enlargement level that is relevant and
    sensible for sensors of these sizes (or 35mm film), the issue is non-
    existent.

    So, yes, show us the images. You have said you can at least show us
    the canon one - so do so.

    And here's an extra challenge. Show us a real world image with the
    problem.


    Frankly, this smells like a Sigma/Foveon fanboy post - I think i just
    wasted my time responding to a troll. Oh well.
     
    mark.thomas.7, Feb 23, 2007
    #9
  10. adminforto

    Large Format

    Joined:
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    Bayer colours

    Don’t let’s be rude to adminforto, technically he could be right although it would be difficult to set up the photographs to work. A Bayer sensor (whether CCD or CMOS as in the case of the eos 1Ds Mark II) has a grid where each part has four sensors recording red, blue and green x2. Colours are obtained by demosaicing from adjoining colours. If it were possible to set up adminforto’s picture that accurately it might be possible, although stretching credibility, to create a situation where no red or blue is detected and the dominant green are the only sites having an effect.

    Incidentally, as the grid needs four sites per unit the duplicate green is used rather than one of the other RGB colours because of the greater sensitivity of green. For the same reason night vision glasses show a green image.
     
    Large Format, Mar 14, 2007
    #10
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