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.
For a 1.25" adapter to use C or CS mount CCTV type cameras with telescopes,threaded to accept standard 1.25" filters.
For one high quality C-mount (male thread) to 1.25" (fit any telescope with 1.25" eyepiece tube) eyepiece convertor for telescopes.
Watch the moon or even local scenery from your living room HDTV with a C-Mount Video Cam or any device with a VGA socket. The inside of the adapter is fully threaded to minimize reflections,made of black anodized aluminum.