Re: ISO / Noise / Megapixel


Thanks for your clarification


"Randy Berbaum" <rberbaum@xxxxxxxxxxxxxx> escribió en el mensaje
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"Fco" <no@xxxxxxxxxxxxxx> wrote in message
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My Lumix FZ18 has an option called "Highest sensitivity". When I set this
option, the maximun Megapixels accepted are 3.

I do not understand very wee why?

Does it mean that if I reduce the Megapixels the noise is also reduce?

Thanks
Paco

The way I would take this is that noise tends to be single pixels that are
not accurately reading or reporting a low level signal. By averaging
several adjacent pixels the apparent noise would tend to be minimized. But
that would mean that if you average several pixels, that group of pixels
are being stored as a single pixel. Thereby reducing the pixel count and
resolution of the final image. Just reducing the resolution by itself may
not reduce the noise, unless the averaging is also implemented. JMHO

Randy

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Randy Berbaum
Champaign, IL






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