Quote Originally Posted by Rick Burnett View Post
What these charts aren't showing is the curve characteristic of the sensitivity of the capture. Film reactivity as you reach overexposure slows down due to the fact that photons might be hitting portions that are already exposed whereas with digital, it doesn't work like that. That is one of the reasons they look different because digital doesn't work like that at all, instead, after the image is captured from the sensor it is then (unless you are staying raw) converted into a curve that matches what the film sees but not what the sensor actually saw.

That's interesting what you say about photons hitting already exposed portions. I was aware of the curve, but I never really understood why the curve was there specifically. The interesting thing is that the "Camera Shootout" folks that put out the chart described the Alexa as totally blowing away film. The following year, they didn't even test film against the latest and greatest digital cameras. Their claims seemed ridiculous since they were obviously comparing apples and oranges. The Alexa still has no problem blowing out highlights.