The new Advanced version can have interchangable rings by using an optional Arca Swiss style quick release plate and clamp. The rotator now has 10 different click settings, 3, 4, 6, 8, 10, 14, 18, 20, 28, 36. The advanced version is available for 7 different lenses. The previous Classic version is available for the Lensbaby Circular Fisheye and Sigma 4.5mm lenses. The quick release and rotator products for Advanced are not compatible with the Classic version.