I am reading through the Training library at the moment. Came across the section about ... (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 settings are simply mathematical trickery. For example, on my 20D, if I set 3200, the sensor system simply carries right on shooting at 1600 (because that is as high as the amplifier can go) but the camera electronics set one of negative compensation and double whatever number the A/D converter puts out."
So what are the "main" settings on a D5500?
Is this generally the same across most DSLR's?
Buy shooting with "main" am I reducing the "electrical noise" ?