For several years now I've been wanting to get a good shot of the osprey in this tree, which affords them a good view of the nest. (They also favor a utility pole....) I've been shooting with the 300 + 1.4X lately and this day I put on the 2X for some portraits. The 2X isn't tack sharp on the older 300 IS -- the result somewhat resembles a soft-focus portrait lens. Possibly not helped by the amount of intervening air.
Canon 7D2, 300 f/2.8 IS, Canon 2X III. Tripod. ISO 800, f/5.6, 1/2000. I tried some at ISO 400, a little more stopped down and lower SS but they were softer. Hope to have a chance to try it again. Clearing morning fog.
Minor adjustments in LR and into PS to composite a thin strip along the bottom from another shot -- this was the best pose but the tail was a little too close to the edge of the frame. A slight amount of cleaning up along the bottom edge and some tweaks to the color balance. Slight brightening of the eyes.