Re: ATM open/closed tube?

[Bob Goff <goffaxe@azstarnet.com>]

In my optics lab, when testing a Newtonian set, I have found that even the
very careful presence of myself near the optical path is totally
deliterious to the image. 
    Tube.

Bob



At 09:33 PM 08/27/2001 -0600, you wrote:
>
>I have asked in an eairler post which would be best , an open or closed tube
>and the general opinion was that either could be optimised to perform quite
>well.  I have since decided to design my new project primarialy for
>planetary use and am now wondering if the above  would still apply.
>   Hal
>
>
>
>
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