CCD vs. CMOS

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  • Member since
    May, 2009
CCD vs. CMOS
Posted by yousaf465 on Friday, May 01, 2009 9:58 PM
Is CCD better than CMOS for astronomy. such as SX 10 vs Sx 1 Canon.
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  • Member since
    January, 2008
Posted by TeleNoob on Saturday, May 02, 2009 7:25 AM

CCD is usually preferred, although CMOS technology has improved and is also useful. I think that most CCD's have lower noise and are better for long exposures. But if your imaging bright objects such as planets, CMOS can do fine. CMOS are often cheaper in cost. Some cameras such as the Meade Lunar Planetary Imager use a CMOS sensor. It's very camera-specific, and depends on which sensor is being used in the camera. Some are much better than others. I can't comment on those cameras that you mentioned.

If you want to make an informed choice you need to look at the specifications for the camera, especially the low light sensitivity. Usually this is indicated in units of Lux. But there are many other factors to consider as well, such as the software, the lenses, the cost.

Different types of cameras are useful for different imaging techniques. What is it you want to image, and whats your budget?

 

  • Member since
    January, 2004
Posted by tkerr on Saturday, May 02, 2009 8:18 AM

If you google CCD vs CMOS you will find an abundance of information and comparison reviews on them.  You might find that since both only collect light and convert it into electrical charges they are both quite good at it and only getting better as technology advances and improves. However,  it's not just the type of sensor chip in the camera you want to be looking at, but also the processor chip and the technology used and how well it handles the data collected by the CCD or CMOS sensor chip, i.e. color balance, noise reduction etc..   Some processors are excellent at reducing noise, or what it thinks is noise, and in doing so will also remove some of the stars that you want. Others will know the difference or give you the option to use noise reduction or not.  

If it is a camera you want to use for DSO imaging I would consider a Canon DSLR rather than a Canon PowerShot.  The PowerShot camera's are not suitable for Prime Focus Deep Sky Photography.  You can however use them for  A-Focal photography of the moon and larger planets.

 

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Equipment: Orion XT10 Classic, Celestron C6 R-GT (CG5 GT mount), C80ED Canon EOS 350D, Canon EOS 50D, Meade DSI II Color CCD, Phillips SPC900NC

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