I've tested a Blackmagic Design 4K camera and was very disappointed by the vertical fixed noise pattern. It was apparent to me even before I knew it was called that, or that there was an online petition about it. I could even see it on the internal LCD while shooting, and immediately thought "This is not something I want to work with."
I have seen some well-respected video geeks defending Blackmagic by saying, "There is nothing wrong with the camera -- it is just the spec."
In all sincerity, what is meant by that argument?
I don't understand why raising the ISO / ASA one stop from Native 400 to 800 and getting that much noise is considered acceptable. I am used to working with 5Dmk3 or C100, and having much more room to work the ISO / ASA before getting that much noise. Having only one choice above 400 (and introducing that much noise) seems odd.
Would some of the more experienced cinematographers mind explaining? Is this something more common in what is considered a "cinema" workflow? Meaning, are "cinema" cameras generally set at their Native ISO / ASA -- leaving control of exposure through aperture, shutter, and lighting?