Shortly I'll have a Canon 400/2.8L non-IS series I in hand. The Canon Museum lists its weight at 6.1kilos. It would be on a 5DMkII, 0.81Kilos with 0,315kilo grip. Total weight, 7.225Kilos or 15.9lbs.
Now I have an RRS BH-40 ball head. RRS rates it at 18lbs/8kg.
Do I need to start saving for the BH-55? Can I limp on for a few weeks with the BH-40?