I owned the first generation Home Dome. It was the one with teflon on the ring for rotation. They later went to wheels.
Issues I had with it:
The triple shutter would fall off at a fairly regular basis. It was fairly simple to put it back together again, but frustrating since it happened a lot. Once in a rare high wind event the shutter blew off completely and I got snow into the observatory. The dome was at my second home, so having the shutter blow off was a serious issue. I did quickly devise a simple rope system that secured the shutter to the dome. It never blew off of that.
The dome was located in heavy snow country. Which is one reason I bought the dome thinking it would shed snow better than a roll-off roof. The snow load was such that the base rings bulged and the dome started sticking on rotation. That is really awful in a dome, since you end up moving the dome a LOT.
I didn't have an issue with water coming through the dome, except for the shutter issue. I did have a problem with water coming in on the floor.
The door was fine for younger folks, but getting under the door at an older age would be more difficult.
If your handy, I would probably build square walls for the dome. I used three sets of dome rings. For a dome, the base and particularly the base ring for the dome needs to be perfectly level. That is more difficult to achieve. If you end up using the dome rings I would reinforce them with curved wood insets.
I placed the bottom of the base rings on a deck and tried sealing it against water infiltration. That failed. You really need to have an overlap system that sheds water out of the area.
I called Home Dome and tried to get information on upgrading the dome, and was told that generation of domes were crap. They had no interest in helping me out. I did buy the assembly manual for $25 and quickly determined that it was not going to be easy to "fix" the dome with my skill set. I ended up selling it to a guy that knew all about fiberglass and he thought he could fix it.
The advantages of the dome are that they are great in wind. It is much warmer in a dome. I had a 17.5 DOB inside the dome and it was nice for a large DOB. You get plenty of headroom yet the base ring wall was only 3 feet high allowing me to look down to the horizon with the 17.5.
Domes are great for large visual DOBS. I have a roll-off roof that I prefer for viewing and imaging.
My carpentry skills are pretty awful.
My first observatory was a 8X8X5 bolt together box with a take-off roof like a shoebox. Then a 10X16 roll-off, followed by a 10X10 roll-off and the Home Dome.
If I had to do it again, I would just kept building the 8X8X5 bolt together observatories. Cheap. Quick and easy to build in one weekend. Easy to convert to a warm room or storage for telescopes. The downside is ugly as sin so you probably want to hide them behind a fence.
Edited by vsteblina, 13 December 2024 - 09:03 PM.