Sony HC5E low frame rate in low light

Discussion in 'Sony' started by D, May 21, 2008.

  1. D

    D Guest

    Hello!
    Why does a panoramic video (in an evening or inside a building, shot
    by Sony HC5E camcorder) look like the frame rate is about 10 fps? My
    11-year old JVC VHS-C camcorder never had this problem.
    Best regards,
    Dima
     
    D, May 21, 2008
    #1
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  2. D

    :Jerry: Guest

    Because there is not enough light falling on the CCD?... As the old
    saying goes, crap in = crap out!
     
    :Jerry:, May 21, 2008
    #2
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  3. D

    John Guest

    Maybe your son's JVC has a more sensitive CCD device than your Sony, so
    can run at a higher frame rate in low light.

    John.
     
    John, May 21, 2008
    #3
  4. D

    D Guest

    Thanks for replying!
    The JVC VHS-C is 11 year old. It is mine, not son's.
     
    D, May 21, 2008
    #4
  5. D

    D Guest

    Thanks Jerry for replying!
    Why is there enough light for the 11-year old JVC VHS-C camcorder, not
    for the 100 times more expensive Sony HC5E camcorder in the same
    conditions?
     
    D, May 21, 2008
    #5
  6. D

    :Jerry: Guest

    Thanks Jerry for replying!
    Why is there enough light for the 11-year old JVC VHS-C camcorder, not
    for the 100 times more expensive Sony HC5E camcorder in the same
    conditions?

    Because of the way the camera is designed, DV camera have always
    needed more light, OTOH electronic tweaking (automatic gain etc.) of
    the available image has improved, so although the camera will produce
    an image in less than 1 Lux the image will be poor.
     
    :Jerry:, May 21, 2008
    #6
  7. D

    D Guest

    Thanks Jerry for your explanation!
    Do all DV camcorders drop a frame rate to 10fps in an average
    appartment illumination?
     
    D, May 21, 2008
    #7
  8. D

    :Jerry: Guest

    Thanks Jerry for your explanation!
    Do all DV camcorders drop a frame rate to 10fps in an average
    appartment illumination?

    How a certain camera does given a certain level of light, depends on
    the spec - and I don't mean the spec that the marketing men use as
    sales fodder either - I don't have the spec of the Sony HC5E so can't
    even start working it out, nor have I the time to go hunting it down
    ATM. :~(

    BTW, what is the 'average' apartment illumination, some people live in
    darkness and others live in a light level only normally found in a
    medical operation room, this is why camera specs use Lux levels -
    http://en.wikipedia.org/wiki/Lux, note the first (main) table.
     
    :Jerry:, May 21, 2008
    #8
  9. D

    D Guest

    Thanks Jerry for answering!
    The spec of the Sony HC5E
    Image Device: Size :1/3.0 ClearVid CMOS Sensor
    14bit DXP :YES
    Advanced HAD technology :NO
    Number of Pixels Gross (K) :2100
    Number of Pixels Act Camera mode (K) :16:9 Mode ; 1430 / 4:3 Mode ;
    1080
    Number of Pixels Act Memory mode (K) :16:9 Mode ; 1490 / 4:3 Mode ;
    1990
    Focus: Full Range Auto :YES
    Focus: Manual :YES
    Manual Focus Key :panel
    Spot Focus (Touch Panel) :YES
    Spot Meter :YES
    Minimum Illumination (lux) :2.0
    Minimum Illumination with NightShot (lux) :0.0
    SteadyShot (Image Stabilisation) :Super (electronic)
    Night Shot :Super NightShot
    Camera Noise Reduction :NO
    Shutter Speed :1/2-1/425
    White Balance :Auto / Outdoor / Indoor / Onepush
    Scene Selection :Twilight / Twilight Portrait (Still only) / Candle /
    Sunrise & Sunset / Fireworks / Landscape / Portrait / Spotlight /
    Beach / Snow
    Auto Slow Shutter :YES
    Colour Slow Shutter :YES
    Backlight Compensation :YES
    Smooth Slow Rec :YES
    Interval Rec. :NO
    Fader :Black / White / Mosaic / Monotone
    Telemacro :YES
    http://www.sony.co.uk/view/ShowProd...icalSpecs&imageType=Main&category=HDD+HDV#tab

    The 'average' apartment illumination is 200W of incandescent light for
    a 20 sq.m. room.
     
    D, May 21, 2008
    #9
  10. D

    Rob Guest

    Hi Dima,

    If you are looking at it on a PC, are you sure that the problem isn't
    that the PC is on the slow side? HDV is quite demanding.
    If you don't see this effect in normal daylight, or are not using a PC,
    forget what I said.

    Cheers,
     
    Rob, May 21, 2008
    #10
  11. D

    D Guest

    Thanks Rob for replying!
    I don't see this effect in normal daylight and am not using a PC.
     
    D, May 22, 2008
    #11
  12. D

    D Guest

    Yes, it looks like the the CCD integrates the light over a longer
    period to compensate, rather than raising the gain.
    It is not a switchable setting: low noise at the expense of low frame
    rate versus normal frame rate at the expense of more noise due to
    winding up the gain in my case.
     
    D, May 22, 2008
    #12
  13. D

    D Guest

    Thanks Mortimer for replying!
    Yes, it seems odd that it happens even at normal interior lighting
    levels inside a house to me too.
     
    D, May 23, 2008
    #13
  14. D

    D Guest

    Hello!
    The Sony service says today that the camcorder is normal. The contact
    personel did not test the camcorder. The Sony service does not allow
    to contact technicians which tested the camcorder the days before.
    Sincerely.
     
    D, May 24, 2008
    #14
  15. D

    D Guest

    Thanks Mortimer for your reply!
    Yes, it sounds absurd that I can't talk to the technician. The front-
    line personnel does not pass to technicians all the information about
    the problem which I said to them.
    The Sony repair shop is located away from the front-line offices.
    The problem is worsened by automatic switching shutter speed below and
    above 25 fps during shooting! The switching is noticeable and
    disturbing!
     
    D, May 24, 2008
    #15
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