Excerpt: It's a quality product and worth every penny. Very smooth pan. Versatile with three different leg settings, I particularly enjoy the ability to reverse the center-beam for close-in macro-shooting and document archiving. Bottom line is. . why put an expensive camera and lens on a flimsy base? Perfect for me; someone not a pro but looking to get more serious about photography. Some have complained that it is a bit heavy and that's true. .
Excerpt: I use this for landscape photography, and HDR work.<br />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.<br /><br />The maximum weight it will support is 5 Kilograms, or 11 pounds, so your 400mm 2.8 is to heavy for this unit.<br /><br />I like the dual levels, no more off kilter photographs!
Pros: Folds Small, Good Stability, Unfolds Quickly
Excerpt: I have used this product to shoot landscapes, and for panning. It has a very smooth swivel for panning, and is very sturdy for long exposures. It is extremely well built. While it is a bit heavy, I like the solid feel of it.
Pros: Folds Small, Good Stability, Unfolds Quickly, Very Sturdy Tripod