Quote Originally Posted by HDNitehawk
#3 matters more than 1 and 2. We know that 5D II will handle noise better.

I agree that #1 is irrelevant to the discussion. Talk of pixel density only adds to the confusion.


Tecnhology, however, can only take you so far. Sensors are less than 100% sensitive (ie, they register fewer than 100% of all photons), but the day isn't far off when sensors will be close enough to 100% sensitive that the only real parameter of the three will be sensor size. In the end, it is really effective f number that determines how fast one can expose (or, with a given f number, sensor size is what matters).