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Freshman

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3 CCD cameras can better handle low light situations. The image is split into three colors and processed seperately. There are some other advantages as well.
The sensors on a CCD chip can only pick-up "brightness" (not "color").
In order to produce a color picture with a 1-CCD camera, the pixels of the CCD have to be shared between the 3 primary colors (Red, Green and Blue). 50% of the pixels are used for Green, 25% for Blue and 25% for Red. The camera electronics calculate the missing pixels and produce a color picture. Due to this technique only about half of the resolution of the CCD is visible in a color picture.
A 3-CCD camera uses 3 separate CCD for Red, Green and Blue and the camera electronics combine 1 pixel from each CCD to a color pixel. As a result the full resolution of the CCD is visible in a color picture! The colors are also more precise and lifelike than with a 1-CCD unit.
"I fear that Omelas so far strikes some of you as goody-goody. Smiles, bells, parades, horses, bleh. If so, please add an orgy. If an orgy would help, don't hesitate." -LeGuin
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| Posts: 20 | Location: The Woodlands, Texas | Registered: November 28, 2003 |    |
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Freshman

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I just read about the chip thing tonight in a film book. I'm assuming that all high end dv cameras have 3 chips or do some have more or function differently? Do the Can GL-1/GL-2 / XL1 have 3 chips? 
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Freshman
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yes, the gl-1, gl-2, and xl-s have 3-chips. but the other thing to take a look at besides the 3 chips is how large they are / how many pixels they have. for example, the GL-2 has 1/4" chips and each chip has 410,000 pixels. the GL-1 only has 270,000 pixels. both are 3-chips, but the GL-2 is clearly superior, and it is totally obvious. (and cams with smaller CCD's also don't function as well under low-light.) so be sure to check out the resolution and CCD size when checking out a cam, too. and yea, higher-end dv cams will have 3 ccd's. prosumer cameras, and even some consumer models these days, also can have 3 chips. but, as i said, the quality difference will be ENORMOUS when comparing a consumer 3-chip, such as the Sony TRV-950, to a high-end 3-chip, such as the Panasonic SDX-900. (a $25,000 3-chip cam with 2/3" chips and some insane amount of resolution.) so look into it all! 
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| Posts: 71 | Location: Soquel, CA, USA | Registered: November 18, 2002 |    |
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