Am thinking of getting the 'Bigma' 50-500mm f4-6.3 APO EX HSM for use with my 10D. Am currently using the Manfrotto 486RC2 ballhead with a Manfrotto 190B (which I may upgrade to a 055Pro if I get the lens). Any recommendations for a suitable ballhead which would provide adequate support for this combo? Or is the 486RC2 adequate for this load? Total weight is abt 3.5kg (assuming 10D w/ batt grip ~1.4kg + weight of lens ~2.0kg). Would appreciate your kind advice/input.
Thanks in advance.