Re: ATM Invisible spider vanes....

[RDuvall@pixworks.com (Robert Duvall)]

At 11:08 AM 5/1/97, Anderson, Jay wrote:
>Just wondering if anyone has experimented with a window to suspend the
>secondary holder on a Newt?  I have read some things that indicate that
>optical glass must be used and its surface must me near perfect.  What
>about 3/8" or 1/2" plexiglass?  It is 10X clearer than optical glass (I
>understand).  Maybe I am missing something but seems to me that having a
>window will remove all vane obstuction and diffraction caused by the
>vanes and so improve image contrast.  Also, the telescope tube could be
>a closed unit and so not suseptible to thermals, dust on optics, dew,
>etc.  Geeze, you could even pump out the air and fill the tube with
>Nitrogen or something.  Just a thought.


Here we go again... I knew talking of creepy things would lead someone to
this. Check the archives. Entire DAYS have been spent discussing this.

Let me know if we ever reached a conclusion ;)


Robert Duvall

Software Engineer, Amateur Astronomer (TN),
and General Scientist (according to my son)
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