Re: The difference between grain and noise.

On Apr 29, 8:48 pm, "Rudy Benner" <rudolfben...@xxxxxxxxx> wrote:
<ronvi...@xxxxxxxxx> wrote in message

news:d5e4c9e0-c15e-4f6a-abbc-5791e090e8e4@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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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