Thanks for the info on what you did to get this.amazing that it was just some tonal adjustment..really wonderful image quality. I don't have a 400, but I got a 2X extender for my 200mm 2.8 IS L lense..I haven't used it yet, though. Impulse buy..but hopeing to use it this summer with some baseball games. I just got a monopod, too for it, so that should be fun. Hope you are well..yes, I am trying to take care of myself, too..Always lots to take care of with famliy and we must each keep ourselves strong to be able to be there for others.. I know it too well....as do you! Enjoy your time in Florida!