I use my 600 f/4 on a Gitzo 5562GTS which is an update to the 5561SGT. I couple that with a Wimberley Gimbal and usualy use the TC-17 which puts me out to 1000mm on my FX cameras. I would have to recommend that you do not carry the 600 f/4 mounted to the tripod and head as it is just too heavy to be safe. I carry my 600 on a strap and mount it when I am ready to shoot. If the light is very good I sometimes use one of my DX cameras and no teleconverter which puts me out to 900mm.