After purchasing a SIRUI. K-40II Ball Head, and a SUNWAYFOTO L Bracket for the 5D MkIV. Yes, the ball is 54mm in diameter,and the head is capable of holding 35 kilos in weight.
After purchasing the Canon 5D Mk II, on the 31st December 2010. And after 8 years of faithful service traveling from Port Macquarie to Ulladulla along the coast. Young to Mudgee and places in-between.