: I would like to build a cassegrain type telescope. I find mostly information on newtonions. Is it too difficult to set up a cassegrain? Any sugestions are appreciated. : Thanks.

Steven,

Cassegrain telescopes can be more difficult for these reasons:

- Usually there is a hole in the Primary mirror. - The secondary (convex) can be difficult to correct because it must be tested with the primary.

If you are buying the optics already made, then these problems are not yours. If you intend to grind your own optics, be prepared for much work.

I apologize for not having more information on the Astronomy Net. Soon I will have a guide to telescope design here. Since all of the work on this website is by volunteers, this information is taking a bit longer to create. Stay tuned.

For the moment, please visit the other websites relating to telescope making. Go to the Astronomy Net top page and select Astronomy Resource Locator. Type "ATM" in the keyword field and hit return. You will see a list of links that may help you find what you are looking for.

Sincerely, John Astronomy Net Editor

• Astronomy Net - Astronomy Resource Locator