Hello all. I have recently acquired a 500 f/4 P and a Gitzo 1325, and not have much of a budget left for a Wimberley gimbal, I am now looking for alternatives. I will not have funds for a Wimberley for quite some time, but would like to start using this lens. I am pairing the lens with an f100, and thought a beanbag would help, but I simulated a bean bag with towels and found focusing to be problematical. I would like to use this lens in a "hide" shooting Whitetail deer, and maybe birds at the bird feeder.