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Re: [ATM] ATM edge support

To: ATM List <atm@atmlist.net>
Subject: Re: [ATM] ATM edge support
From: "Richard F.L.R. Snashall" <rflrs@rcn.com>
Date: Mon, 09 May 2005 23:54:48 -0400
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The Alarm Co. wrote:

>
> I also toured the Hobby-Eberle. Here's a puzzle (one the guide couldn't
> answer). Its primary is an 11 meter f/1.5 sphere. How much difference in
> sagitta would there be if it were a paraboloid? (answer withheld as an
> exercise for the reader, and also because I haven't figured it out yet)
>
That depends.  Is the f/1.5 measured at the center or at the edge of the
sphere where the focal length is shorter?;-)
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References:
- [ATM] ATM edge support
  - From: "The Alarm Co." <tac@i1.net>

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