Roxco
07-13-2007, 08:40 AM
http://en.wikipedia.org/wiki/Film_speed
However, this standard ISO speed "rating" for a digital camera is not necessarily very related to the ISO "setting" or "exposure index" used on the camera.
The image sensors in digital cameras can be adjusted, or can have their outputs adjusted, in sensitivity to function with metering at any given ISO setting. This is usually done by simply amplifying the output of the image sensor, which increases image noise, sometimes beyond the level that the ISO standard says is acceptable.
***********
Anyone care to share how these two standards differ in practice?
I don't want to accuse the RED Team of tweaking for a standard!
TIA - Rosco
However, this standard ISO speed "rating" for a digital camera is not necessarily very related to the ISO "setting" or "exposure index" used on the camera.
The image sensors in digital cameras can be adjusted, or can have their outputs adjusted, in sensitivity to function with metering at any given ISO setting. This is usually done by simply amplifying the output of the image sensor, which increases image noise, sometimes beyond the level that the ISO standard says is acceptable.
***********
Anyone care to share how these two standards differ in practice?
I don't want to accuse the RED Team of tweaking for a standard!
TIA - Rosco