lhm4000

Hi Jim, I went with CraftCloud3D: https://craftcloud3d.com/ I was able to get 4 of the rings printed (in ABS black) and shipped to me for $9.99. It was the same cost to get 1 or 4 printed and same total shipping. So I have a few spares and can use them with my other reducers if necessary. Hope that helps, Lamar

I did this with one of my Celestron f/6.3 reducer/correctors. I took off the lock ring and flipped the entire piece over. The reducer glass is on the bottom, a 2mm tall plastic spacer, and finally the corrector (field flattener) is on top. If you just put the focal reducer glass back in, there is nothing to prevent it from flopping around in the housing. Since I don't have a 3D printer I found a place online that would print a 43mm outer diameter, 1mm thick, 9mm tall spacer ring. I just got it today in the mail and it fits perfectly. It holds the focal reducer glass in place (where it always has been) very well. This should not change any characteristic of the reducer since the glass is still in the same location in the housing. I just put in the new spacer, put in the focal reducer glass, and then tightened down the lock ring.