The JMI focuser will fit to refractors. I've used mine briefly on my 4" just to confirm. I still had to rough focus with the R&P and then finish with the JMI. The JMI comes with the required adapter. But you should already have it. Its the SC adapter that comes with the microfocuser that is used to attach focal reducers etc. Just remove the 2"-1.25" adapter from the 2" focuser of the refractor and slip the SC adapter in, in its place. Works a treat.
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