Nothing..it's beautiful, but it won't allow the exchange of the 8" Brandt lens and the 9" Clark lens. We decided that might be a good thing. Siegfried ----- Original Message ----- From: "Chuck Hards" <chuckhards@yahoo.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Tuesday, November 02, 2004 9:26 AM Subject: Re: [Utah-astronomy] Re: Great E-bay telescope ad
Then a casting is the obvious way to go. It doesn't have to be metal, either, composites would work fine, in fact better than metal for this application since thermal expansion wouldn't be an issue. (My 5" achromat was pinched in it's factory cell until I opened it up a tad, made a world of difference in performance.)
What's wrong with Patricks existing tube assembly?
--- diveboss@xmission.com wrote:
Chuck,
We need to adapt Patricks 8" lens to fit the Clark's 9" ring.
Guy
Quoting Chuck Hards <chuckhards@yahoo.com>:
A piece that thick won't be cheap (maybe if it's radioactive...).
Is this for a cell or endpiece? If most of the interior is to be machined away, perhaps a casting made from a pattern would be cheaper, and take less time on the lathe to finish...just a thought.
--- Patrick Wiggins <paw@trilobyte.net> wrote:
BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap?
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