Hi Everyone,
I've started thinking about an observatory. I like the dome variety however the commercial examples seem very expensive. I note there have been a few discussions about using a poly water tank as an observatory, however I found these guys make poly swimming pools which I think could easily be made into a dome (turned upside-down).
http://www.polyworld.com.au/1-produc...swimming-pools
The 5500L model is $1500 and is 2.4m diameter 1.2m high.
With some easy modifications I think you could turn one of these into a dome. I've made a little drawing to show what I mean. I think a large plywood ring could be attached to the base to support rollers and the opening could be edged with aluminium angle to create a weather tight seal.
What do you guys think?
Although its still not cheap, I think it would still be at least half the price of a commercial dome.
Cheers,
David.