The tube holder for FSQ-106ED is essential for the fixing of the tube on a mounting. It has the 2 holes for fixing on Takahashi mountings as well as Kodak screw pitch for fixing on a photo tripod (not recommanded however). Moreover, it is equipped with a Kodak screw intended to receive a SLR/DSLR camera for a parallel connection. An auxiliary plate is provided to allow a satisfying balance of the optical tube on mountings