mdfenton wrote:
On my monitor --- I have clear blue-sky in a photo showing bands, each about a sixteenth-inch wide, extending about 1 1/2 inch away from the edge of the photo. It looks like a comb was dragged across the sky from the photo edge. There is a subtle change in blue hue between bands. I see it at 17% to 50% magnification, but not beyond 50% to 100%. I don’t know whether these bands would show in a print. Would anyone care to guess what this banding is? Is it noise? Many thanks.
The cause for this is usually because the image has been reduced to an 8-bit image. In other words, a jpg image. Sometimes an image that is raw and edited down to a jpg and/or 8-bit image will show banding. It's always best to shoot in raw. If you edit your image and see that banding is taking effect, then make sure you retain 16-bit properties of the image and try not to drastically edit the sky or the part that is banding.