Driving Ridgefield NWR’s auto tour, just coming out of the woods, I noticed the Great Egret and the Great Blue Heron way out in the field to my left (400 feet, after checking Google Earth). After taking some shots I realized that the egret was on a branch further back from the heron. I added the 1.4x extender to my 500mm and stopped down to f9 to increase DOF. It helped some but could have been stopped down even more. When I was finished shooting, not far ahead, the road took a 90 degree turn left as I drove so I could see the scene from the right side of the photo. The branch the egret is on is actually from a different tree and an estimated 15 feet behind the heron. After checking a DOF calculator, it seems I should have had a good 50 feet of DOF at 700mm, and therefore, a better focused egret. Maybe there is a greater % of DOF in front of the heron leaving less behind it?? Not sure, but in any event, I liked the appearance that these two birds were performing the same preening action so close to each other.
Canon 5D Mark III, 1/640, f9, ISO 640, 700mm, 6:02 p.m. Aug. 29, 2014