Perfect alignment of the tripodThe SIRUI adapter half-shell 75mm is necessary for horizontal alignment of the mounted head with the SIRUI levelling hemisphere 75mm. This eliminates the annoying alignment of the tripod legs.Especially for panoramas and when using 3D tripod heads, the head support must be level. Video cameras used with a video head on the SIRUI RX tripods should also be mounted on a level head mounting plate for panning shots.With this offer you will receive the SIRUI 75mm adapter half-shell RX-75A. Perfectly designed for SIRUI broadcast heads BCH-10, BCH-20 and levelling hemisphere RX-75B.