Thanks guys. I did the vast majority of my safari shooting with my 80-400 lens, but at times the animals were so close I couldn't fit them in frame even zoomed out all the way, like the big guy pictured below. At one point he was within arms reach of the truck. That leopard shot was taken at 300mm, and he was about 15 feet away.
DSC_8194 by
FluidKaos, on Flickr