500mm f4 lens, 1.4 extender, Canon 50D

Yes, this, on tripod, is a heavy set-up to lug around. But, if you have it get out there with it and you will be rewarded. I carried mine on a two mile loop through Hanna Park recently and the workout paid off. This shot of a young Red-shouldered Hawk is a favorite from that shoot. The hawk had just ruffled its feathers and paused long enough for me to get this image in very nice light.