When I was going to my car in the carport I noticed a Swallow flying in food to it’s chicks in a nest in the eaves of the carport. So I went to get a camera to photograph the chicks. The nest was in a very dark corner on the inside below the roof edge. Because of how dark it was and I was using a 300mm f/4 lens @ f/5.6, I upped my ISO to 3200 ISO to get a little higher shutter speed to get to sharper images in the dim light.