Sorry I can't help you with any more information on this scope, but this is an interesting find. I didn't know Zeiss Jena made a small reflector and had no luck searching the net for another one. A few years ago I exchanged emails with someone in Germany selling a 4.5" Zeiss made Newtonian mirror that was intended for the ATM market. I'll do some digging to see if I can find those.
Hi Steve and Rick,
Thanks for you answers,
Certainly is a very interesting design. a rate squared secondary, helical focuser, and unusual right angle finder. I have no clue about it and to me it looks very appealing! Its like a newton Telementor :-)
What a great looking scope! I don’t have any info on it but I noticed the secondary mirror looks to be square! My very first telescope from the 70’s was a tiny reflector (40mm aperture) and it also had a square secondary. Perhaps that was normal for small Newts back then?
I will try to find more info with some Zeiss enthusiasts.