Can anyone explain what was causing a rainbow-like reflection in some photos I took today with the E-P3 and PL25? I was also shooting with the P20 - all of the PL25 images showed some type of this rainbow-like wavy color, but it doesn't show up in any of the P20 images. Hood on, no polarizer or other filters. Here are two examples, cropped to roughly the same FoV. Panasonic Leica 25mm f/1.4 f/4.5, 1/4000, ISO 200 Panasonic Lumix 20mm f/1.7 f/5, 1/4000, ISO 200 I know I changed relative angles in these two shots, but I have more images from other points around the lot with both lenses and the rainbow effect only happened with (all of) the PL25 shots.