Beautiful photo, Armando. Quite a remarkable capture for 1/500th @ 500 mm. I like the complementary palette of colours and the dark tones. I might be tempted to crop a bit closer, which would make the background seem to dissolve even more, but purely a matter of taste. I rented a 200-500 mm some time ago to photograph herons (among other things), and found it a good and versatile lens. Despite the high quality/price ratio, however, I haven't been tempted to buy one. Cheers, John