On a nicer and better lit day than the previous shoot, I again tried the 7D versus the white pelicans. This time, I used a polarizing filter with the 100-400mm IS lens. I stayed a long time, filled up the 8GB card, edited the card, filled it again, edited it again and filled it again – all on the same battery! I was impressed.
Sometimes I was shooting birds in the sky, sometimes birds in the water and sometimes birds against a backdrop of foliage. I experimented with the auto focus settings as well as Av and manual exposure modes. It seems to me that the best results were with the single center AF point and AI Servo in manual exposure mode. Usually the exposure was around 1/1000 at f8 and ISO 800 (about two stops lost to the polarizing filter).
All in all, I was happy with the 7D and am beginning to feel better about my own skills with it. Here are a few of the better shots.