NorBro
Major Contributor
I'm not sure I buy that explanation. For one thing, new color science can be rolled out to all BM and RED cameras, low-end and high-end alike. And if that hypothesis were correct, you certainly wouldn't expect a newer 5D to have worse color than an older 1D, as is the case.
My guess is that it's more like with the stitched-sensor ARRIs yielding more dynamic range. John Brawley told me that only cream of the crop ALEV sensors were selected to create larger-format cameras, and that they performed slightly better than average with regard to DR, but that otherwise there was no reason why there would be a DR advantage over the S35 Alexa. Obviously, that's not what goes on with the 1D vs 5D but there could be some other unreported quality control or component difference.
Quality-control is a given and an obvious explanation that shouldn't even be mentioned because that's just the way life works.
God himself isn't making these parts so they aren't divine and will naturally differ. They cannot all be perfect, it is impossible.
So I'm sure their form/condition/whatever affect IQ - and Jarred himself once said on REDuser they throw away dozens of sensors on a daily basis (or weekly, IDR) - but other than that there is no doubt it's software-related because that's how they calibrate the looks in-house. One sensor used in the same camera could produce totally different pictures (like two different models).