2,1 Meter Classic Dome (Spaltkuppel)

 The dome was acquired from the Astronomical Society of Zürcher Oberland after it had served them well for over 30 years and was replaced by a new Baader dome in September 2020. In the summer of 2021, I began giving the dome a complete overhaul. The quality of this Baader dome is simply incredible. Even after over 30 years, with a bit of effort, it could be refreshed. The rubber parts and rollers needed to be replaced, and the top layer required a few minor repairs which went well. This was mainly due to the high quality and generously sized thickness of the fiberglass construction and top layers. After being freshly polished and waxed, it shone like new. Baader company supplied me with a new seal, even after more than 30 years!

Since its assembly in June 2023, the dome has already experienced a heatwave with temperatures over 36 degrees in the shade, as well as two thunderstorms, one of which tested the dome with 120 km/h winds and heavy rain. During the heatwave, the temperatures inside the dome remained consistently at least 2 degrees below the outside temperature, and during the heavy rain, not a single drop of water found its way inside. I definitely don't have to worry about the instruments set up in the dome.
Christoph B.

Note from Baader Planetarium GmbH:

Further information about the fascinating history of this over 30-year-old dome can also be found in our world map entry of the new 2.1m dome for the Astronomischen Gesellschaft Zürcher Oberland (AGZO).
Moreover, our customer has kindly provided us with a detailed report on the conversion, installation, and re-instrumentation of his dome. You can find this here
From Relic to Modern Observatory: The Story of My "Antique" Baader Dome