The Panasonic AK-HBU3500 Build-Up Kit is designed for use with AK-HC3500 HD studio camera and allows for smooth and quick mounting of the camera, ensuring compatibility between the optical axes of the viewfinder and the camera. The build-up unit offers lens exchange without the need to detach the camera head and large studio lenses can be mounted onto this unit. ENG/EFP lenses can be mounted onto this unit with the help of AK-HLA3500 plate. The build-up unit offers cable less design by providing direct connection to the camera head for fast and easy mounting.