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.
ISO of a camera is related to sensitivity of light. In the case of digital cameras, ISO sensitivity is a measure of the camera's ability to capture light.
When you want to capture an image you need to always adjust your camera setting. Your camera setting should be a combination of ISO, shutter speed and aperture.
In a day time I would suggest you to put ISO around 100-250(fixed) and adjust your shutter speed and aperture according give a hit and try I am sure you will get good quality picture.