In some recent high-ended cameras, there are two native ISOs, which can greatly reduce the noise when using a large ISO.
charshou
Is there a way to find the optimal ISO for any given image or scene, or a measure for how much noise is acceptable?
buggy213
"optimal" is a bit hard to quantify, but there are various rules of thumb that people have used for a long time to photograph subjects in different lighting conditions (sunny+outdoors, overcast+outdoors, indoors, etc.)
autoexposure systems can be built by analyzing the statistics of brightness levels within the image
Bill-Shao
Im curious as to why ISO is multiplied before analog to digital conversion. Conceptually, it seems doing it post digital conversion seems similar to brightness or vibrance in traditional image editing software, so I was wondering if there was some benefit to doing it in the analog stage.
In some recent high-ended cameras, there are two native ISOs, which can greatly reduce the noise when using a large ISO.
Is there a way to find the optimal ISO for any given image or scene, or a measure for how much noise is acceptable?
"optimal" is a bit hard to quantify, but there are various rules of thumb that people have used for a long time to photograph subjects in different lighting conditions (sunny+outdoors, overcast+outdoors, indoors, etc.) autoexposure systems can be built by analyzing the statistics of brightness levels within the image
Im curious as to why ISO is multiplied before analog to digital conversion. Conceptually, it seems doing it post digital conversion seems similar to brightness or vibrance in traditional image editing software, so I was wondering if there was some benefit to doing it in the analog stage.