For a while now we have been enjoying the visiting birds on the top of our neighbors tree across from our front door. Today it was a very colorful male Northern Cardinal. So I shot a series of images using a Tamron 150-600mm lens with a Sigma 2X teleconverter on a Canon R. This gave me a final focal length of 1200mm so I upped my ISO since I was handholding the camera. The Canon R autofocused fine with this combination. Images were taken @ 1/500 sec, f/11, 1000 ISO. As I was photographing him, he kept an eye on me in the first few minutes. After a while he just kept looking to the left & right.