I have seen a few questions about Tripods and Large Format Lenses but nothing specifically addressing how weight capacity will affect stabilization.
I am assuming that I do not want to get legs with a capacity just high enough to barely support the lens that I want to buy (I've not decided between the 500mm F4 and 500mm F4 ISII USM Canon Lens yet) since I read in one of the links I included that the capacity takes into account the extra loading hung on the ring below the legs.
I've been interested in the Gitzo 2542 Mountaineer legs. The load capacity for those is 39.7lbs. The 500mm lens weighs only 7.3 pounds (I am leaning towards the 500). Is this overkill? Will I be happy or more than happy going with that? or would it actually make sense to go with an even stronger tripod like the 2542ls or 3542ls? Essentially ... "Will I gain support by having extra load capacity?" and what is the trade-off (naturally a few hundred bucks is part of it)? My subject of interest is wildlife (mostly birds). I watched a video recently that stated that the 3-series Gitzo tripods are among the most popular for wildlife photography so maybe I should spring for something like the 3542ls.
I realize there are other considerations like the height of the legs (I'm about 5'10") but I'm thinking the max height of 65.7" of the Mountaineer should be more than enough for me. I'll likely also be getting the Wimberly Head (probably the WH200).