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Re: [ATM] View's through my new scope and what to do next



David Williams wrote:
> Hello
> 
> Does anyone know how to correct for coma in a primary mirror say like in a 20" diameter, 1" thick plate glass, 8 foot focal length mirror?  The images I'm seeing with my telescope set up with the uncoated primary mirror so far are this:  The green in the leaves of the tree in the distant tree instead of looking green, look a grey color.  And they lack contrast.  Is this a problem with the shape of the mirror, or should I go ahead and get it aluminum coated at http://home.covad.net/~alcoat/   where they could coat it for about $100.  
> 
> Here is a way to get to the place to see a picture taken through my telescope.
> Click here:   http://www.atmlist.net/contrib/dwilliams1128-at-earthlink-dot-net/
> 
> then  click  on                 20" telescope stuff   
> then click on                  ViewThourghMy20Inch  #'s 1 and 2

Maple doesn't cut it.  You have got to test against pine!;-)

-- 

Rick S.

http://users.rcn.com/rflrs

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