On Apr 29, 8:48 pm, "Rudy Benner" <rudolfben...@[EMAIL PROTECTED]
> wrote:
> <ronvi...@[EMAIL PROTECTED]
> wrote in message
>
>
news:d5e4c9e0-c15e-4f6a-abbc-5791e090e8e4@[EMAIL PROTECTED]
>
> > What is the difference between grain and noise? Do digital images have
> > both? Do both terms mean the same thing in the contexts of film and
> > digital?
>
> > Thanks,
> > Ron
>
> Here is my understanding. Your opinion will vary. Everyone is entitled
to
> their own stupid opinion.
>
> Grain is a film issue. Noise is a digital issue.
>
> The sensor in a digital camera is of course an electronic device. It
> generates a certain amount of noise. The signal from the sensor is
analog.
> It is then converted to digital. The ISO (ASA for us olde folks) setting
is
> the gain setting for that analog signal. Higher ISO means more gain.
More
> gain means the noise is also amplified. If the light is low, then the
signal
> (light) to noise ratio is low, and the noise will become more
noticeable.
>
> Some cameras do better than others in dealing with this noise issue.
>
> The bottom line is, use a fast lens and a low ISO setting.
>
> There are programs available that do a fairly good job of masking noise.
>
> Ok guys, flame away.
Hi Rudy,
When did it change to ISO? Why did they decide to change it? And grain
is simply a non-issue for digital cameras - good to know.
Thanks,
Ron
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