ISO 800+ -- high noise

Started 2 months ago | Discussions thread
lehill Veteran Member • Posts: 5,194
Re: ISO 800+ -- high noise

GivenToFly wrote:

Thanks very much! See below.

8.8mm, f 2.0, 1/200 second, ISO 800

8.8mm, f 8.0, 1/30 second, ISO 800

You have another thread going and the guys over there are giving great advice too.

The thing that made it all "click" for me is I realized the camera electronics applies the ISO setting only after the sensor has collected all the photons. So it's important to collect as many photons as you can at the very start to reduce noise. That's done by setting the shutter as long as you can (eg, 1/60 sec is better than 1/200 sec) and setting the aperture as big as you can (eg, f/4 is better than f/8). This allows you to use the lowest ISO you can.

DPR has a couple of multi-part articles that explain this stuff:

What's that noise? (what causes noise)

Choosing a camera (about noise & pixel size & sensor size)

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Lance H

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