Not really sunny. Sunny beyond where we were. It was actually drizzling rain on us and we were flying mostly under a cloud bank. I wanted a higher ISO so that I could use a higher shutter speed. especially with a polarizing filter. That and the Nikon D750 I use handles low light well. Even at those higher ISO. If you zoom way in you will see some noise but a lot of what appears to be noise is the drizzle of rain.