I have camera canon eos6D, and I have problem with ISO. When I`m shooting in daylight, or light indoor places, my camera always chooses to have auto ISO over 500, sometimes even over 1000. When I was shooting outdoors in the evening, ISO level was over 2000, even 5000. When I set it lower, not auto, pictures are very dark. Is there something wrong with my camera? Before 6D I had canon 1200D and there were no problems to shooth with low ISO (about 100) outdoors.