Sirius Optics 1.25 Inch to C/CS Mount

The telescope adapter has a diameter of 1.25 inches for insertion in place of a 1.25 inch telescope eyepiece, allows the camera to be put into standard 1.25" eyepiece holders. The opposite end of this adapter has a C-Mount (1 inch diameter with 32 threads per inch) standard for all "C"inama photography movie cameras.