Re: ATM 18 inch telescope

["Amelia Thomas" <amelia_thomas@hotmail.com>]

Hello All
I haven't seen any comments on this email so I'd like to ask, besides a 
larger central obstruction and more difficulty collimating are there any 
drawbacks to this "folded telescope" design. How difficult would collimating 
be? Are there any websites dedicated to a scope built this way? Again sorry 
for the repeated message. If I accidentally hit enter it sends the email. 
This feature is very annoying to us all. Amelia

>From: Steve Fejes Reply-To: Steve Fejes To: usc@sover.net, "ATM@shore.net" 
>Subject: ATM 18 inch telescope Date: Sat, 29 Dec 2001 22:50:56 -0500
>
>
>Joseph,
>
>Some people have found a way to bring the eyepiece down to a more 
>comfortable viewing height in bigger reflectors. There are two designs that 
>come to mind other than the Cassegrain design already mentioned.
>
>(snip) The other idea uses a flat secondary mirror (bigger than normal) 
>which reflects the image back toward the primary mirror. Then a smaller 45 
>degree angle mirror reflects the image to the side of the tube. The tube 
>will look similar to a Newtonian telescope, but the focuser is closer to 
>the middle of the tube. (snip)
>
>Steve
>
>

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