Administrator: Reverted edits by Abcd1234 (talk) to last revision by Administrator

2012-07-05T08:09:04Z

Reverted edits by Abcd1234 (talk) to last revision by Administrator

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'''Noise''' is the digital equivalent to graininess in film. Higher [[ISO]] settings generally lead to higher noise levels in the final image. With digital cameras, the ISO setting is a gain on the [[pixel]]s to make them more ''sensitive'' to light. A lower light level is increased at higher ISO settings. [[Photographers]] often shoot at the lowest possible ISO setting. That setting is determined by the amount of light available and the [[shutter speed]] or [[aperture]] desired for the final image. If the ISO setting results in noise, the photographer may post process the image to decrease the noise, but generally loses sharpness/details in the image in doing so.

More [[pixel]]s on a [[sensor]] does not always mean a better image due to higher noise levels for a given amount of light reaching each [[pixel]]. Many digital camera manufacturers have reached a practical limit to the megapixels on their [[sensor]]s, and instead of continuing the megapixel wars, they are seeking improvements to noise reductions for the pixels they have. Many newer DSLRs have low noise at high ISO settings.

<gallery widths="400px" heights="600px">
File:Iso800 1677.jpg|A 100% [[tight crop|crop]] showing excessive noise at [[ISO]]-800 without any post processing
</gallery>
<center>
<gallery widths="400px" heights="400px" caption="100% Crop of a non-naked subject">
File:Iso100 3037.jpg|[[ISO]]-100 f/4.0<br>low noise, sharp
File:Iso1600 3053.jpg|[[ISO]]-1600 f/4.0<br>noise
File:Iso1600nr 3053.jpg|[[ISO]]-1600 f/4.0 with Noise Reduction<br>low noise, less than sharp
</gallery>
</center>
[[Category:Photography]]

Noise - Revision history

Administrator: Reverted edits by Abcd1234 (talk) to last revision by Administrator