The reducer to chip distance is adjustable via a threaded section and lock nut - very convenient for use with different scopes. It's a 0.8 reducer so it takes f/7 or f/6 to f/5.6 and f/4.8 respectively.
It's also not too pricey at US$200:
https://williamoptics.com/products/a...t-not-included
It's listed for a variety of scopes but I can only personally confirm that it works with the TS115 atm.