During the pandemic, I have been doing a lot of bird photography, shooting manually with the Canon R5 with the RF 100-500. Since the lighting and shadows can vary dramatically where I shoot, the time it takes to adjust the ISO is enough time for my subject to disappear. I've tried using Auto ISO but I find the details in light/white area often get blown out. Is there a setting on the camera that I can adjust by a stop or two (AWB?) that allows Auto ISO to do its thing but still lets me somewhat control the outcome? Thanks.