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Thread: Which is better: CCD or CMOS?

  1. #1

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    ahmed

    Which is better: CCD or CMOS?

    Whats better a ccd or a cmos and wats the diffrence
    thanck youu
    Ahmed ...

  2. #2

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    Andre Burger

    re: Which is better: CCD or CMOS?

    Leica S2 has a CCD sensor. Why?

  3. #3
    Moderator GrumpyDiver's Avatar
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    re: Which is better: CCD or CMOS?

    CCD is an older technology that was very good in its day, but has now pretty well completely been replaced by CMOS. As Andre has said, there are a few high end medium camera models still in production that use it, but it is no longer in use in the regular DSLR lines.

    The CCD sensor was slightly more expensive to make, was able to capture the the entire image at once but was susceptible to damage from radiation (dead pixels after a long airplane flight was always a possibility) and the real downside is that the technology needed a lot more power than CMOS. CCD sensors also had an issue that if you saturated a sensor element, this would overflow to adjacent sensor elements and would introduce artifacts into the image.

    CMOS has overcome many of the intial issues and now has better low light performance than CCD ever had. The image capture is done by a scanning operation, so there can be some skewing when capturing high speed subjects, is less susceptible to ionizing radiation damage and draws less power.

  4. #4
    RustBeltRaw's Avatar
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    Lex

    re: Which is better: CCD or CMOS?

    It's worth mentioning that CCD cameras are still in use, but mainly for high-end astrophotography and scientific imaging.

  5. #5

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    re: Which is better: CCD or CMOS?

    One reason to go for a CCD sensor is sensitivity/dynamic range. With a CCD you can up your flash-sync speed to ridiculously high values. Manufacturers like Leica and Phase One use them to make optimal use of leafshutter lenses. The PhaseOne 645DF with an IQ140 back and a Schneider leafshutter lens can reach a flash-sync of 1/1600. Fast enough to be able to virtually black-out ambient light at high noon on a sunny day. This sensitivity is btw also a bit of a downfall. Noise becomes unbearable at even moderatly high ISOs. So forget it if you feel a need to go over iso800.

  6. #6
    Moderator GrumpyDiver's Avatar
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    Manfred Mueller

    re: Which is better: CCD or CMOS?

    Quote Originally Posted by Hero View Post
    One reason to go for a CCD sensor is sensitivity/dynamic range. With a CCD you can up your flash-sync speed to ridiculously high values. Manufacturers like Leica and Phase One use them to make optimal use of leafshutter lenses. The PhaseOne 645DF with an IQ140 back and a Schneider leafshutter lens can reach a flash-sync of 1/1600. Fast enough to be able to virtually black-out ambient light at high noon on a sunny day. This sensitivity is btw also a bit of a downfall. Noise becomes unbearable at even moderatly high ISOs. So forget it if you feel a need to go over iso800.
    Ahmed - none of these are entry level cameras, they are super high end pro cameras, so they not something you are going to be interested in.

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