For Nikon D800 + battery grip horizontally and vertically stable enough also works with the Manfrotto 303 Plus for Pano photos stable, the locking lever must (portrait photos) in vertical use are tightened firmly. The plate dimensions correspond to the standard dimensions 60mm at the side of the stand, correspondingly larger top, see photo. The spirit level is well appreciated by the lateral attachment. Unbeatable price performance, production and materials 1A!