Excerpt: I use this for landscape photography, and HDR work.It's tall enough, solid, and not too heavy to carry on a trail, although I wouldn't want to take it more than a few miles.The maximum weight it will support is 5 Kilograms, or 11 pounds, so your 400mm 2.8 is to heavy for this unit.I like the dual...
Pros: Folds Small, Good Stability, Unfolds Quickly
Excerpt: This tripod is as good or better than alot of the higher priced ones i have looked at. Its smooth and easy to set up, the lever style leg locks hold solid as does the center coloum, very sturdy. I am six foot and with the center coloum all the way down its the perfect hight for me, no hunching over.
Pros: Good Stability, Solid, Unfolds Quickly, WELL BUILT
Excerpt: I haven't got a lot of use in yet as the weather here is still very inclement, but the overall construction suits my needs. Yes, it is heavy compared to some of the carbon fiber units out there, but for a quarter of the price.