Hi everyone ........... I would like to build a 12 foot diameter observatory this Spring that has a shutter that rolls back. Bi parting shutters are okay but can act like sails when the wind picks up. I don't quite understand how to have it roll back and still remain water resistant. If someone has some carefully drawn plans I might be willing to send you some money for them. The diagrams below might be helpful. I'd like to end up having something for a Newtonian that would allow me to see objects that are lower in the sky. Also I wouldn't have to fuss with any ladders. The old color pic from a catalog kind of explains it. Thanks
Edited by wavefront, 17 January 2021 - 07:20 PM.