I see a lot of carl zeiss theolodite telescopes. What are they used for and what makes them so expensive? Just wondering.
carl zeiss
Started by acgtek, 12/06/2003 07:33PM
Posted 12/06/2003 07:33PM
Opening Post
Posted 12/06/2003 09:09PM
#1
Alex,
Those are typically surveying instruments and are made to very exacting standards mechanically even more so than optically. They are used for land layouts and engineering.
Carl Zeiss made a number of astronomical telescopes though as well. The most commonly seen is the 63mm x 840mm Telementor refractor. There were a number of other long focus 3" and 4" scopes and a few fluorite APO and a Cass too. They are found used occasionally and command a premium price. Noted mostly for quality of the opticalsurface finish and polish. Color correction is still limited because of their 2 element achro design but it seems the final figure makes secondary color of little significance.
Tony Miller
Those are typically surveying instruments and are made to very exacting standards mechanically even more so than optically. They are used for land layouts and engineering.
Carl Zeiss made a number of astronomical telescopes though as well. The most commonly seen is the 63mm x 840mm Telementor refractor. There were a number of other long focus 3" and 4" scopes and a few fluorite APO and a Cass too. They are found used occasionally and command a premium price. Noted mostly for quality of the opticalsurface finish and polish. Color correction is still limited because of their 2 element achro design but it seems the final figure makes secondary color of little significance.
Tony Miller
Funding Member
