Why does noise exist?

13 years 5 months ago #5762 by Hamtastic
How is noise created to begin with? I know when you increase ISO more noise is created, but why is that?


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13 years 5 months ago #5767 by Eddy
I always thought it was increase of electrical charge needed so the sensor can take take correct quality image.


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13 years 5 months ago #5966 by waynescook
This may be because there is insufficient light. But it can be a camera issue if it does not have any way of changing ISO settings. The subject, especially if it is all black or or if there are a lot of shadows, can also cause this problem. Or, it may be caused by a low quality lense.

I hope this helps.
WCBIRDNLANDSC


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13 years 5 months ago #5967 by Hamtastic

[email protected] wrote: This may be because there is insufficient light. But it can be a camera issue if it does not have any way of changing ISO settings. The subject, especially if it is all black or or if there are a lot of shadows, can also cause this problem. Or, it may be caused by a low quality lense.

I hope this helps.
WCBIRDNLANDSC


A lens would cause noise also? How is that, the lens is just glass, unless the lens is dirty?


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13 years 5 months ago #5991 by Screamin Scott
Lens quality has absolutely nothing to do with noise. It's caused mainly with by high ISO settings & by small sensors. Full frame cameras are much better than crop cameras when it comes to noise in images as they have larger sensors..Here's a Wiki on the subject...

en.wikipedia.org/wiki/Image_noise

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

Photo Comments
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13 years 5 months ago #6165 by Travel Nut

Screamin Scott wrote: Lens quality has absolutely nothing to do with noise. It's caused mainly with by high ISO settings & by small sensors. Full frame cameras are much better than crop cameras when it comes to noise in images as they have larger sensors..Here's a Wiki on the subject...

en.wikipedia.org/wiki/Image_noise


Good post


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