Quote Originally Posted by Trevor Crone View Post
The payload for the 3530S is 18kg so there is plenty to spare when using my Ebony and Manfrotto geared head.
18 kg is the weight of a small child... No ordinary photography tripod can carry that! Just imagine a 5-year old toddler sitting on top of your tripod

Anyway, the weight a tripod can carry is usually not so much limited by the tripod itself, but by it's tripod head. Looking at the Gitzo website (http://www.boeringa.demon.nl), I am pretty much convinced the true payload of this tripod is more in the 4 - 6 kg range (including tripod head), as Gitzo recommends this one for 300-500mm lenses.

The 18kg is probably a figure that denotes the TOTAL weight the tripod might just be able to withstand theoretically, including how much weight you can hang BELOW the tripod to strengthen / stabilize it, NOT the weight on top of the tripod.