Evening,

I am reading through the Training library at the moment. Came across the section about ISO... (http://www.ausphotography.net.au/for...anation_of_ISO)


Quote from training: "Q: So the "native ISOs" are taken care of by the amplifier, but the "other ISOs" are not?

A: Correct! All the non-native ISO settings are simply mathematical trickery. For example, on my 20D, if I set ISO 3200, the sensor system simply carries right on shooting at ISO 1600 (because that is as high as the amplifier can go) but the camera electronics set one stop of negative exposure compensation and double whatever number the A/D converter puts out."

So what are the "main" ISO settings on a Nikon D5500?

Is this generally the same across most DSLR's?

Buy shooting with "main" ISO am I reducing the "electrical noise" ?

Thanks
Shane