David, I'm not sure, but I think we're somewhat in agreement. If both cameras have the capability of ISO 100 available to them, and both shooting in the same ambient light conditions, but because of less high end electronics in one camera it may need to bump the ISO up to 200 in order to accomplish the correct end result. Whereas, the camera with higher end electronics can yield the same result at 100 ISO...and I know there will be some differences in the F/Stop and shutter speeds between the two. When I say higher end electronics, I'm speaking of improvements in CCD, or CMOS sensor technology, faster and higher resolution A/D processors, larger and higher speed buffers (RAM), and higher performing Digital Signal Processors. I sell this crap (industrial electronics) for a living, and like teaching for yourself, this is how I make my living.
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