Re: ATM 3-Vane or 4-Vane Spiders

["Patrick St. Jean" <stjeanp@pat-st-jean.com>]

On Fri, 5 Oct 2001, Nils Olof Carlin wrote:

> Well what are the alternatives? a Schiefspiegler, an optical window, a
> refractor, no telescope at all?

What about the, for lack of a better word, non-Newtonian reflectors I've
seen pictures of?  The ones where the primary is angled so that the main
tube is clear of obstructions...  Is there anything special that needs
to be done when making a mirror for them?

Pat

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