Noise on 5Mp & 8Mp cameras

Discussion in 'UK Photography' started by Turbohat, Jul 10, 2004.

  1. Turbohat

    Turbohat Guest

    I'd (now I see) wrongly assumed that the image quality of a 8MP camera would
    be better than a 5MP

    However I've read lots of comments on noise due to the small pixel sise. So
    is the noise level better on a 5MP camera?

    I don't intend to print any bigger than A4, but the extra 'cropability' with
    8MP would be a benefit.

    Would I be better of with a 5MP camera, and have extra cash in my pocket?

    Turbohat, Jul 10, 2004
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    Bob, this is an image from a Minolta A2 at ISO 64. I do not consider the
    noise to be excessive on this camera at 64 or 100, and the anti-shake
    means that for non-moving subjects, 64 to 100 equals 200 to 400 on other
    cameras. However, it's no use at all at 800 (say) when shooting concerts
    or low light level action pix - you might as well forget that.

    The granularity present in the sky blue is also present, to exactly the
    same degree, in Minolta's 5 megapixel version - and in DSLR images from
    Nikon and Kodak, but not so much from Canon, who seem to have picked up
    on the fact that people notice this, and use a softening process to mask
    it. Olympus images have slightly less granular structure but are also a
    little softer in colour, Sony are very similar to Minolta.

    This sample pic is unprocessed (default settings), and using Photoshop
    CS I would normally eliminate the chromatic fringes which occur on some
    building edges at this 28mm setting. It's been changed from a 16-bit
    ERGB tiff into an 8-bit JPEG at maximum quality. It is Adobe RGB space.

    David Kilpatrick, Jul 10, 2004
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  3. Turbohat

    TP Guest

    At high ISO ratings, yes, the 5MP will have much lower noise. However
    you may be satisfied with noise levels at low ISO speeds (around 100)
    In my opinion, yes. Use the cash saved for accessories such as a lens
    hood, filters, a flashgun, memory cards etc. The cost of these
    accessories mounts up.

    But be warned; some 5MP cameras have much more noise than their 3MP
    equivalents. For example, the Canon G5 is often criticised for
    excessive noise but its G3 predecessor was generally excellent.

    So it all depends on which 5MP camera you choose.
    TP, Jul 10, 2004
  4. G3 was 4mp. And when I tried the G5 I thought anything above the lowest ISOs
    were too noisy, I dread to think what the Pro 1 is like...
    Martin Francis, Jul 11, 2004
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