The Takahashi TKA20203 Multi CA Ring 60 has M52 x 0.75 female threads on one side and M52 x 0.75 male threads on the other. This is commonly used to connect the Takahashi Multi-Flattener to Takahashi FS-60CB and FS-60Q (without Q module attached) telescopes.
|Optical length||31.3 mm|
|Connection side A||M52 x 0.75 female|
|Connection side B||M52 x 0.75 male|