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jmi focuser
Hi guys I have a problem someone might be able to help me with ,I have acquired a 12 inch dob for our club orion it had a old type screw in and out focuser so I thought I might change this for a jmi event horizon that I had on my 10inch s/ newtonion as I have just replaced it with a lovely moonlite but the problem is on the dob I cannot get enough inward travel to focus a eyepiece this is only for visual use ,would moving the mirror upwards in the tube make any difference not sur how to approach this without selling the jmi focuser and buying just a manual one Crayford style ,the jmi is very smooth and focusers really well
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