In the 70’s quite a few parts for DIY newtonians were sold with the Unitron label - I had 3 focusers and a couple of finderscopes and some other parts.
There were two rack & pinion focusers - a small 0.965” one for 4”...6” scopes, and a larger one for 8” and up; these had a cast curved base to match the usual OTA sizes of the period up to 12”.
The larger focuser was quite good - it had a decent sliding drawtube and could take 0.965” or 1.25” eyepieces.
I don’t have a catalog anymore from that era, but from memory a couple of the Unitron mounts and many of the parts were available separately at the local astro shop (which has long since closed).
It was fairly common to find the astrophotography types were using 8”...12” newtonians with a 75mm Unitron refractor on the side as the guide scope.
Edited by luxo II, 31 March 2021 - 09:06 PM.