Thank you everyone for your input, what I was trying to inquire about is related to Mitch's comment about how the Alexa double pulls from each photosite simultaneously. I am trying to achieve a look known in the still world as High Dynamic Range, where two exposures are taken, one three stops over, and one three stops under, the two shots are put together creating an interesting look. I had heard that this might be possible in the Alexa rather than utilizing a beam splitter and two cameras.