austindonald1 wrote:Does 6.5 microns square difference affect quality of picture?
In general, larger photosites = more photons hitting each photo site = less noise relative to a smaller photosite (of the same design)
it also has a relationship to color. The stronger the color filter dyes on the RGB photosites, the more accurate the color, but the less light that passes through (lowering the native ISO of the sensor). So, there are trade offs between photosite size, light sensativity, and color quality.
Those tradeoffs explain part of the reason that all of ARRI's cameras (so far) have exactly the same photosite size. When ARRI has increased the K count of its camera sensors, it has done so by increasing the size of the sensor while keeping photosite size the same. This means that the image between different ARRI camera sensors - the s35 Alexa, the Alexa LF, and Alexa 65 - is very consistent in terms of color quality, dynamic range, native ISO, and noise character.