hmzimelka Offline Upload & Sell: Off
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Yeah, it's the ADC. I've had something similar happen on my D700, which warranted a ADC replacement after a calibration didn't improve on the lines much. After the the replacement, Nikon and myself were still not happy, which then resulted in a sensor replacement. For some reason, I've come across this more on D3S bodies than D3 or D700.
These lines were one of the biggest gripes of my D700, although, mine weren't intermittent and not as visible. But it's the same 12 pixel interval lines inherent in the D3, D3s and D700 sensors. By looks of it though, your camera's ADC might be failing.
As mentioned, the sensor channels are read are evenly spaced at around 12 pixels. I noted some of these pattern noise lines (subtle) even in the official Nikon D3s samples. Some cameras were perfect, some not well calibrated. See the Nikon sample bellow...
Nikon D3s Sample image: Eagle
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