I'm beginning to think we need to put a sign outside of our Solar Room door saying "Birds Welcome".

In between Mama and Papa Cardinal flying in & out to feed their baby, this Hummingbird briefly flew into the room to check things out.

Because I quickly grabbed the closest camera that had any zoom to the lens, I ended up with the 100-400 lens with the extender attached.

Thus, I was automatically stuck @ f/8 in low light. To get enough camera speed for a darting Hummingbird, I then had to push my ISO waaaaaay up to 12,800. Not ideal camera settings. Still, in low, diffused light, I did capture the subject. Less noise would have been better, of course. But considering my shooting situation, I'm not displeased. This little fellow was not taking off & landing anywhere. He was just flying around randomly. So I'm pleased to have gotten a half way decent photo of him in flight. - inside the house in low light.

Back lighting from the window was a major problem (thus the use of exposure compensation). Unfortunately, I couldn't get enough light to take an "in focus" photo without the bird being near the window. So I had to tolerate the back lighting. This was totally unexpected and fun camera practice. His little fluttering wings sounded like a bumble bee in the house.

For frame of reference, our Solar Room is 12x80 feet in size and not tiny. It is a totally indoors room (part of our house) that extends across the entire back of our home. Time of day for the above photo was late afternoon with diffused low lighting.