The tube holder is essential for the fixing of the tube on a mount. It has the 2 holes for fixing on Takahashi mounts as well as Kodak screw for fixing on a photo tripod (not recommended however). Moreover, it is equipped with a Kodak screw intended to receive a SLR/DSLR camera for parallel connection. An auxiliary plate is provided to allow a satisfying balancing of the optical tube on mountings.