3 megapixel shot from a 6 megapixel camera

Discussion in 'Digital Cameras' started by Neil, Jan 16, 2007.

  1. Neil

    Neil Guest

    Hi All,

    Can anyone tell me how Image Resolution is done for a Digital Camera ?

    For example, with a 6 mp camera, when I switch it to give me a 3 mp shot,
    does it simply switch off the outer photosites on the imaging sensor and
    give me a rectangular array of photosites in the centre of the required size
    (kinda like digital zoom).

    The reason I ask is, if I wish to capture a shot with less noise, do I get
    any improvement (noise reduction) by shooting below the cameras ultimate
    resolution capacity ?


    Thanks,

    Neil
     
    Neil, Jan 16, 2007
    #1
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  2. Neil

    Androo Guest

    Can anyone tell me how Image Resolution is done for a Digital Camera ?
    If it just used the centre portion of the sensor, I guess it would be like
    having a different lens. Your image would be cropped and appear 'zoomed in'.
    The focal length of the lens and the size of the sensor are linked.
    I think most cameras combine pixels when you set them to lower resolutions.
    You do get less noise but only because there are fewer pixels and reduced
    detail. Overall, I doubt you'd benefit from doing this.

    But... give it a try! Or get noise reduction software.

    Androo
     
    Androo, Jan 17, 2007
    #2
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