Hello, I was taking pictures around our school today and started to notice horizontal shadows across the width of some photos. I know banding is a problem with some cameras and lenses but examples I've seen have consisted of very narrow bands. My pics look like they have shadows. The attached photo was taken in a gymnasium but the lines appear in photos taken in other locations in the building. Then again, there are some photos where they don't appear. Up to now I have not seen this show up in photos taken with the same gear. The attached image shows best what the lines look like. It's not supposed to be a good composition. I chose a shot with no students in it due to permissions. Camera: Lumix GX7 Lens: Lumix 20mm pancake ISO 400 F 2.8 1/250 Thanks for any ideas or thoughts about these ghostly lines.