So I have a D3s that I purchased in 2011 and have had an on again/ off again issue with a type of banding. Typical banding seems to really only affect the images when it at a high ISO or the exposure is pushed but this appears similar to "tank tread tracks". What is interesting to me is that it shows up a low and high ISO's (the below images are were shot at ISO 280), and is visible without having to push the exposure. Has anyone else had this issue with their Nikon? I have a couple images below, one is straight out of camera and the other is with the exposure and contrast enhanced to bring out the detail.